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Figure 3-7. Auxiliary T1 DTE Port Connections, Access-T 100, 200, and 400

Access-T 1500 Units

The

AUX PORT

connectors for the Access-T 1500 are standard 50-pin male RJ48H

connectors. Larscom provides a separate RJ48C connector for each aux interface
via an accessory kit, as described in Appendix E. Alternatively, Larscom pro-
vides an accessory kit with two standard 50-pin female AMP CHAMP connec-
tors which mate to the rear-panel connectors. Refer to Appendix E for pinout
and connection information.

Figures 3-8 and 3-9 show the pinouts for the Aux port connectors. Connect the
leads for each Aux connection to the supplied female 50-pin connectors as
shown in Figures 3-8 and 3-9. Then plug the female connectors to the male
connectors on the rear panel.

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Chapter 3

ACST-0351-005

Installation

June 1996

3-14

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Содержание Access-T 100

Страница 1: ...s underutilized and idle equipment along with credit for buybacks and trade ins Custom engineering so your equipment works exactly as you specify Critical and expedited services Leasing Rentals Demos...

Страница 2: ...Access T 100 200 400 1500 Multi port DSU CSU System Installation and Operation Manual ACST 0351 005 June 1996...

Страница 3: ...subject to change without notice Access T is a trademark of Larscom Incorporated Larscom Incorporated 4600 Patrick Henry Drive Santa Clara CA 95054 Telephone 408 988 6600 Customer Service 408 988 6627...

Страница 4: ...etwork Interface 3 If Access T appears to be malfunctioning disconnect it from the telephone line until it is determined whether the Access T or the line is the source of the trouble If Access T needs...

Страница 5: ...acility designated by the supplier Any repairs or alterations made by the user to this equipment or equipment malfunctions may give the telecommunications company cause to request the user to disconne...

Страница 6: ...and can radiate radio frequency energy and if not installed in accordance with the instructions in this manual may cause harmful interference to radio communications Op eration of this equipment in a...

Страница 7: ...200 integral SNMP one supervisory connection serves all modules This manual describes the functions and capabilities of the Larscom Access T Series 100 200 400 and 1500 products Although identical in...

Страница 8: ...It describes each menu path and its associated options and parameters Chapter 6 Configuration Procedures This chapter provides proce dures for configuring Access T through the Terminal Interface Chapt...

Страница 9: ...ital communication system in North America A T1 facility provides full duplex transmission at 1 544 megabits per second Mbps Bandwidth is divided into 8 kbps of overhead and 1 536 Mbps of user informa...

Страница 10: ...ensity assurance Keep Alive and Yellow Signal Loopback to the line controlled from the network T1 Signal Characteristics The T1 signal is a bipolar pulse train Data is encoded using pulse code modu la...

Страница 11: ...last repeater to be 3000 feet Access T CSUs accurately regenerate a 27 dB signal equivalent to the attenu ation over 5000 feet of cable Figure 1 2 shows one end of a typical T1 link T1 may also be tr...

Страница 12: ...n T1 facilities can handle up to 80 consecutive ZEROS Pulse density requirements may be enforced by either theDTE or the DSU CSU depending on the particular application Pulse density may be guaranteed...

Страница 13: ...g two bipolar violations BPVs as illustrated in Figure 1 3 There are two requirements for the use of B8ZS The CSUs or DTE at each end of the T1 link must be able to encode and decode B8ZS Network equi...

Страница 14: ...illustrates the D4 framing format All 12 overhead F bits in each Superframe are used for frame synchronization As more T1 networks were deployed a primary deficiency in D4 the inability to monitor liv...

Страница 15: ...s channel called the Facility Data Link FDL for diagnostic control and transmission of performance statistics Table 1 A shows bit by bit use of the 24 overhead bits and the robbed signaling bits in ea...

Страница 16: ...it 3 Channel 1 2 24 Frame 1 2 3 4 5 6 7 8 9 10 11 12 1 0 0 0 1 1 0 1 1 1 0 0 V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V V...

Страница 17: ...Bits 1 7 Bits 1 8 Bits 1 8 Bits 1 8 Bits 1 8 Bits 1 8 Bits 1 7 Bits 1 8 Bits 1 8 Bits 1 8 Bits 1 8 Bits 1 8 Bits 1 7 Bits 1 8 Bits 1 8 Bits 1 8 Bits 1 8 Bits 1 8 Bits 1 7 Bit 8 Bit 8 Bit 8 Bit 8 A A A...

Страница 18: ...are not SES Loss of Frame Count LOFC The number of times Loss of Frame is declared Loss of Frame is declared when a device loses sync on the framing pattern for approximately 2 5 seconds Loss of Frame...

Страница 19: ...03 defines two loopbacks Line Loopback and Payload Loopback which are the same as the loopbacks defined in AT T Publication 54016 However under ANSI T1 403 both loopbacks are controlled via the data l...

Страница 20: ...N1 G1 1 1 CRC Error Event G2 1 2 to 5 CRC Error Events G3 1 6 to 10 CRC Error Events G4 1 11 to 100 CRC Error Events G5 1 101 to 319 CRC Error Events G6 1 320 or more CRC Error Events FE 1 At least 1...

Страница 21: ...g is performed by a DACS Digital Access Cross Connect Switch at each network office FT1 is used with DTEs operating at less than the full T1 rate Thus a DSU is required to convert the lower rate signa...

Страница 22: ...andard protocol It takes up few system resources in the managed device It operates in multi vendor environment This section contains a brief overview of SNMP along with a short description of the TCP...

Страница 23: ...base of equipment that does not support SNMP Using Integral SNMP where the managed device already speaks SNMP over its management interface This more efficient method is used by Access T In Figure 1...

Страница 24: ...esentation Most SNMP management operations are achieved through GET and SET commands The GET SET structure is a simple request reply protocol typi cally the SNMP manager sends a request and the manage...

Страница 25: ...ecify and describe Internet protocols An Application Specific MIB which contains the objects or vari ables for such applications as different types of network interfaces For instance there are Applica...

Страница 26: ...ovides a connectionless packet delivery system Each layer of the protocol is responsible for different communication functions Figure 1 8 provides an example of TCP IP protocol layers for an SNMP appl...

Страница 27: ...IP applica tions such as SNMP Other TCP IP applications include Telnet File Transfer Protocol FTP or Simple Mail Transfer Protocol SMTP Transport Layer provides a flow of data between two hosts for th...

Страница 28: ...ss can be imagined to have two parts a netid and hostid Per their names netid identifies a network while hostid identifies a host on that network Figure 1 9 shows a breakdown of the five classes of IP...

Страница 29: ...ing the subnetid and the hostid do not have to be separated on byte boundaries Subnet Mask When subnetting is used hosts on the network need to be able to determine which IP address bits are used for...

Страница 30: ...s Each decimal number gives the value of one octet i e byte of the IP address For example the 32 bit 4 byte binary internet address 10000000 00001010 00000010 00011110 is written in dotted decimal not...

Страница 31: ...address es A match indicates that the IP datagram can be sent directly If no match is made the sender passes the IP datagram to a gateway The IP datagram will continue from gateway to gateway until it...

Страница 32: ...rk 20 0 0 0 Network 30 0 0 0 Network 40 0 0 0 F G H 20 0 0 5 10 0 0 5 30 0 0 7 20 0 0 6 40 0 0 7 30 0 0 6 To reach hosts on network Route to this address 20 0 0 0 Deliver Directly 30 0 0 0 Deliver Dir...

Страница 33: ...nded that an SNMP manager not make an other request until a response is received or a timeout occurs Access T does not support fragmentation of IP packets on either transmit or receive On the SNMP man...

Страница 34: ...rk needs Access T also includes advanced monitoring and alarm functions built in diagnostics and downloadable software upgrades Equipment Architecture The Access T Series 100 200 400 and 1500 differ i...

Страница 35: ...T features downloadable software New software can be transmitted to the Access T from a local or remote PC Software downloads are performed without removing or replacing any hardware and with a minim...

Страница 36: ...anagement system Access T can be used in point to point and multipoint applications In point to point applications a single T1 or FT1 link connects equipment at two locations In multipoint application...

Страница 37: ...1500 chassis must be installed in slot 15 See Chapter 3 for more information To facilitate management of the chained units or nodes a master Access T supports additional features and commands not avai...

Страница 38: ...ypically issued from a Network Management System NMS Serial Line Interface Protocol SLIP is an Internet protocol used to run IP over serial lines such as RS232 cables interconnecting two systems Point...

Страница 39: ...erform diagnostics etc Performance and alarm displays fit within one 21 line screen always displayed below the Title Bar and Main Menu Line The Terminal Interface described in detail in Chapter 5 can...

Страница 40: ...PPP interface which is described in RFC 1331 is responsible for encapsulating SNMP i e IP datagrams In other words PPP defines a sequence of characters that frame SNMP datagrams on an RS232 serial po...

Страница 41: ...tions to a VT100 or TV 925 terminal Also the Craft Port does not require a password enabling you to perform first time configurations and troubleshooting easily Communication parameters are fixed at 8...

Страница 42: ...More detailed applications and Chain Port connections are illustrated in Chapters 3 and 8 Note The Chain Port does not support modem connections The Chain Port can also be used to connect an NMS direc...

Страница 43: ...00 RS485 2 Wire Facilities Communicating Using TABS RS232 MASTER SLAVE SLAVE TERMINAL OR NMS RS485 2 Wire Facilities Communicating Using TABS RS232 Access T 1500 Access T 1500 Fully loaded with 15 mod...

Страница 44: ...DB25 connector supporting the EIA 530 standard Larscomoffersadapter cablestoconverttoDC37 RS449 orMS34 V 35 connectors The pulse density required for T1 transmissions can be assured in several ways T...

Страница 45: ...e External Clock is inactive Transmit Data Transmit Clock External Clock Receive Clock Receive Data Phase Locked Loop required DTE wiring Pin 14 Pin 3 Pin 17 Pin 11 Pin 15 1 2 3 4 5 6 7 8 9 10 11 12 1...

Страница 46: ...cing bit 7 always to be a ONE toward the network only Alarm Indication Signal Generation of AIS to the line or Aux port when LOS or LOF occurs at the auxiliary port or line At least one DS0 must be as...

Страница 47: ...disabled on a per bundle basis The line physical interface is as follows Access T 1 Port 2 Port and 4 Port units employ a female DA15 con nector An adapter is available to convert to an RJ48 jack Acce...

Страница 48: ...cutive DS0s should not be mapped to that DTE port This precaution reduces the possi bility of excessive ZERO transmissions A DS0 bundling arrangement is called a map Access T allows you to create two...

Страница 49: ...the auxiliary T1 DTE interface There is no telco BPV register per AT T Publication 54016 Separate user and telco registers for theline interface allow the user and the telco to clear registers withou...

Страница 50: ...visory Port in three different ways Terminal Interface Mode Access T sends a one line ALERT banner identifying the Access T to an ASCII terminal The operator must then request an alarm history to iden...

Страница 51: ...after 10 consecutive seconds which are not SES Loss of Signal SIGNAL LOSS Access T declares Loss of Signal if it receives 175 75 consecutive ZEROS A Loss of Signal alarm ends when a single ONE is det...

Страница 52: ...ck in this case Internal Communication Failure INT COMM LOSS Access T cannot communicate between the lower and upper boards 4 port unit only Loss of Network Interface Module NIM LOSS A or B NIM LOSS A...

Страница 53: ...toward the DTE All Access T loopbacks are bridged which means that the normal signal path is not broken Therefore when a CS DTE loopback is active the signal from the DTE continues toward the far end...

Страница 54: ...ace Local Access T Far End Access T 1 1 9 3 7 5 8 2 4 6 1 2 1 2 1 2 1 2 9 9 9 9 CS DTE Remote CS Line DS DTE Remote LS Line LS DTE Remote DS Line CS Line DS Line LS Line T1 Line T1 Line Interface 3 5...

Страница 55: ...mapped time slots CS Line loopbacks provide end to end testing which includes the line side functions of the Access T When a CS Line loopback is in effect the receive DTE data and clock replace the t...

Страница 56: ...ishing a Access T failure from a line failure During LS DTE loopbacks any data from the line is ignored by Access T Note During LS DTE loopback Access T must be connected to an T1 line or Access T s T...

Страница 57: ...e slot bundle assigned to the port to be looped back Transmission of loop codes on a given DTE port does not affect the operation of the rest of the bandwidth Only the data bits are used If the bundle...

Страница 58: ...s been achieved and displaying the number of bit errors detected during pattern sync If no loopback is in effect testinginbothdirectionscanbeaccomplished by transmitting QRSS in the same DS0s from the...

Страница 59: ...Facility Interface Code 04DU9 B for 1 544 Mbps D4 04DU9 C for 1 544 Mbps ESF 04DU9 S for 1 544 Mbps ESF with B8ZS Network Interface Jack RJ48C RJ48X or DB15 CSA File Number Canada LR 98938 CSA Standar...

Страница 60: ...00 chassis Accessory Kit 23 inch mounting brackets for Access T 1500 chassis T1 Aux Interface Line Rate Line Codes Framing Options Pulse Characteristics Surge Protection Input Output Levels CSU Line B...

Страница 61: ...and 400 Units 1500 Units DC Power 100 200 and 400 Units 1500 Units Access T 1500 Power Consumption Dimensions Mounting Access T 100 200 and 400 Access T 1500 Temperature Humidity Regulatory Compliance...

Страница 62: ...hese new features will not be supported on Access Ts with the older software Furthermore this new software includes support for the new single port Access T hardware If you are planning to install a s...

Страница 63: ...100 is the same as the Access T 200 but with only 1 DTE port The Access T 1500 is a DSU CSU system capable of housing up to 15 plug in Access T modules in one chassis Each Access T 1500 module has 2...

Страница 64: ...U S E 1 8 1 8 SP11 SP1 J5 CHAIN PORT J6 EXPANDER PORT J4 SUPV PORT J1 DTE PORT 1 J2 DTE PORT 2 J3 EXT CLOCK J8 LINE J7 AUX I 0 F U S E SP1 1 8 J5 CHAIN PORT J6 EXPANDER PORT J4 SUPV PORT J1 DTE PORT...

Страница 65: ...2 1 13 5 9 J2 J1 VT100 PS2 PS1 TV925 ALARM RELAY EXTERNAL DC POWER CHAIN PORT CRAFT PORT CHS GND AUX 9 15 AUX 1 8 SUPV PORT 1 1 2 2 PS1 48V PS1 RTN GND PS2 48V PS2 RTN GND NC NO GDN C NC NO GDN C PS2...

Страница 66: ...that the installation be performed by trained installation engineers These units are designed and tested to operate reliably at an ambient tempera ture range of 0 to 50 C 32 to 122 F To maintain this...

Страница 67: ...provided install the mounting ears on the sides of Access T in the appropriate orientation for the rack width and desired projection 3 Mount Access T securely in the rack CAUTION 1 Ensure that suffici...

Страница 68: ...cess T Series 400 uses a 2 amp fuse part number 250 120 95 the Access T Series 100 or 200 uses a 1 amp fuse part number 250 120 75 If the fuse blows replace it with a new one as described in Chapter 1...

Страница 69: ...ccess T rear panel 4 Install the retaining bracket for the power plug using the 4 40 pan head Phillips screw and flat washer provided This retainer prevents accidental removal of the power plug per UL...

Страница 70: ...rear panel Go to step 3 2 For a Centralized DC Power connection follow the site requirements detailed in the Installation and Site Requirements section at the begin ning of Chapter 3 For dc power conn...

Страница 71: ...uiding card slots Be sure the card is oriented so that the plug on the rear of the power supply mates with the connector in the chassis Push the power supply into the slot until it is securely mated t...

Страница 72: ...A for part numbers Note 1 The acronym DTE has two meanings In most cases in this manual DTE refers to the Digital Terminal or Terminat ing Equipment for which Access T provides the network in terface...

Страница 73: ...turn Receive Data to DTE Transmit Data from DTE Protective Ground Cable Shield 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 Signal Ground Exter...

Страница 74: ...ermine the cable to be used to connect the AUX connector and the T1 DTE 2 Install the appropriate cable between the AUX connector and the T1 DTE connector on the DTE making sure that each connector is...

Страница 75: ...P CHAMP connec tors which mate to the rear panel connectors Refer to Appendix E for pinout and connection information Figures 3 8 and 3 9 show the pinouts for the Aux port connectors Connect the leads...

Страница 76: ...v Tip Slot Number 7 Xmt Ring Slot Number 7 Xmt Tip Slot Number 2 Rcv Ring Slot Number 2 Rcv Tip Slot Number 2 Xmt Ring Slot Number 2 Xmt Tip Slot Number 6 Rcv Ring Slot Number 6 Rcv Tip Slot Number 6...

Страница 77: ...ip Slot Number 15 Rcv Ring Slot Number 15 Rcv Tip Slot Number 15 Xmt Ring Slot Number 15 Xmt Tip Slot Number 10 Rcv Ring Slot Number 10 Rcv Tip Slot Number 10 Xmt Ring Slot Number 10 Xmt Tip Slot Numb...

Страница 78: ...east ten days prior to connection to the net work Details of the notification requirements are avail able from your telephone company CAUTION Be careful whenever installing or modifying telephone line...

Страница 79: ...mate to the rear panel connectors Refer to Appendix E for pinout and connection information Chain Port Connection The Chain Port can be used to interconnect multiple Access Ts as described in Chapter...

Страница 80: ...cess T 1500 modules Series 100 Series 200 units and Series 400 units does not exceed 30 Note The Chain Port can also be used for an RS485 TABS Interface connection to a single Access T or to a chain o...

Страница 81: ...Molex plug a Turn the screw corresponding to the desired wire slot 1 or 2 counterclockwise until the slot is open enough to accept the wire s b Insert the wire s into the slot c Turn the screw clockw...

Страница 82: ...Access T 1500 is hardwired to com municate directly with the DSU CSU module in slot 15 Therefore you can use the chassis supervisory connection to talk with other modules or chained units only if the...

Страница 83: ...ta to terminal Clear to Send CTS Request to Send RTS Signal Ground Data Terminal Ready DTR 1 2 3 4 5 6 7 8 9 Signal Ground Clear To Send CTS Receive Data from Terminal Signal Ground Transmit Data to T...

Страница 84: ...use the chassis supervisory connection to talk with other mod ules or chained units only if the module in slot 15 is configured as the master When the module in slot 15 is configured as a slave you wi...

Страница 85: ...om Terminal Signal Ground Transmit Data to Terminal Request To Send RTS Data Carrier Detect DCD Data Terminal Ready DTR 13 12 11 10 9 8 7 6 5 4 3 2 1 25 24 23 22 21 20 19 18 17 16 15 14 Receive Data f...

Страница 86: ...ess T 1500 rear panel Pinouts for the ALARM RELAY are shown in Figure 3 17 Make connections to annunciation devices as follows 1 For each power supply insert the annunciator leads into the appro priat...

Страница 87: ...ition DIP switches shown in Figure 3 1 Series 100 200 and 400 or Figure 3 18 Series 1500 If setting DIP switches on an Access T 1500 module partially remove the module from the chassis as described un...

Страница 88: ...ave mode For a more detailed explanation on master and slave modes consult Chapter 8 DIP switch settings for all hardware configuration operation mode combina tions are provided in Table 3 A Set DIP s...

Страница 89: ...are Configuration Operation Mode Switch 6 Switch 7 Switch 8 1 Port slave Closed Open Open 2 Ports slave Closed Closed Closed 4 Ports slave Open Closed Closed 1 Port master Open Closed Open 2 Ports mas...

Страница 90: ...Closed Closed Open 18 Closed Open Closed Closed Open 19 Open Open Closed Closed Open 20 Closed Closed Open Closed Open 21 Open Closed Open Closed Open 22 Closed Open Open Closed Open 23 Open Open Ope...

Страница 91: ...R enabled D2 Quiet mode Q1 DCD enabled C1 Echo off E0 Auto Seek command AT C1 D2 W Hayes 2400 Smartmodem only 3 Via the Terminal or TABS Interface configure the Access T Super visory Port for modem op...

Страница 92: ...and its related LEDS However this hardware is located on the rear panel of the Access T 1500 chassis The equipment operates the same on both products The LEDs and Craft Port are described in this cha...

Страница 93: ...I XMT LOOP DTE NETWORK AUX A T N A D SU C SU VT100 TV925 SELECT CRAFT PORT STATUS SYSTEM MAP MAP PORT 2 PORT 4 PORT 1 PORT 3 RCV RCV LINE RTS RTS LOOP CTS CTS TEST D I XMT XMT LOOP LOOP DTE DTE NETWOR...

Страница 94: ...T LINE LOOP TEST AUX STATUS 1 MAP LOOP XMT RCV RTS CTS 2 D I NETWORK SYSTEM DTE PORT LINE LOOP TEST AUX STATUS 1 MAP LOOP XMT RCV RTS CTS 2 D I NETWORK SYSTEM DTE PORT LINE LOOP TEST AUX STATUS 1 MAP...

Страница 95: ...s T RTS is being received Normal data transmission AUX D I Red Amber Green Off Loss of Signal or Loss of Sync on Aux T1 DTE Yellow Signal being received from the T1 line Normal Operation Auxiliary T1...

Страница 96: ...corresponding power supplies There is no power supply indicator on Access T 100 200 and 400 units Craft Port Access T is equipped with a Craft Port Configured as a DTE the Craft Port can be used to c...

Страница 97: ...ft Port does not require a password Also the Craft Port is intended for local use only and therefore does not support modem dial out Refer to Chapter 6 for instructions on how to establish communicati...

Страница 98: ...to fail 2 A configuration option set via one port can be superseded by a subsequent configuration command from another port The last op tion entered from any port becomes the active configuration opt...

Страница 99: ...ormation Node Address Depending on the operating mode one of two node number combinations are displayed at the far left of the Title Bar If the terminal is connected directly to a slave Access T i e n...

Страница 100: ...ss T view alarms and reports and execute diagnostics Keyboard controls for the Main Menu Line and subsequent drop down menus are identified in Table 5 A SYSTEM ALARMS LINE DTE TEST REPORTS COMMANDS m...

Страница 101: ...nu Line where all drop down menus dialog boxes and reports are displayed Note Due to hardware differences between the Access T prod ucts drop down menus and subsequent options i e PORT3 and PORT4 may...

Страница 102: ...of a display in which case it returns you to the previous screen display or exits a dialog box A blinking cursor indicates the current position Table 5 B indicates the possible menu paths and option s...

Страница 103: ...s the Main Menu Line use the right and left arrow and keys As each new item is selected the previous drop down menu disappears and a new one appears For example pressing the key three times moves the...

Страница 104: ...our current menu path position The selection bar in the parent menu remains displayed to indicate the path taken to reach the current position Access T displays all drop down menus along a your select...

Страница 105: ...Use the question mark key to redraw the screen and display the Access T start up menu If Access T is operating asa master the key always takes you back to the master node s initial display ACST 0351...

Страница 106: ...0 ASCII characters 10 ASCII characters 15 ASCII characters 0 is the default Displays current SNMP parameters SYSTEM DS0 CONFIGURATION CURRENT SYSTEM DS0 CONFIGURATION CHANGE MAP1 SYSTEM DS0 CONFIGURAT...

Страница 107: ...NONE EVEN ODD DISABLE ENABLE TERMINAL MODEM DATAKIT TV925 VT100 SYSTEM DATE TIME DATE SYSTEM DATE TIME TIME Month Day Year xx xx xx Hour Minute Second xx xx xx SYSTEM CHAIN PORT CONFIG POLL SYSTEM CHA...

Страница 108: ...1 to 399 errors 100 is default ALARMS NODE ALARM STATUS Display showing which nodes are in a state of alert ALARMS ALARM HISTORY DTE ALARMS ALARM HISTORY LINE ALARMS ALARM HISTORY AUX PORT ALARMS ALA...

Страница 109: ...ST QRSS OFF FULL PORT1 PORT2 PORT3 PORT4 AUX PORT IDLE TEST BIT ERRORS Displays bandwidth in which QRSS is being transmitted whether Access T is synced on received QRSS and number of bit errors in rec...

Страница 110: ...pecified registers Clears specified ESF error count Restarts the NIM software Restarts the Mux software Resets system parameters to their default values Clears the User Buffer Error Count Displays the...

Страница 111: ...ommands is incorrect AUTO VERIFY Automatic check sent after Access T has issued a far end loopback command to discover if far end Access T is looped back to the line AUX LOOP A loopback established at...

Страница 112: ...ransition from ON to OFF or inverted clocks on transition from OFF to ON CODING The line coding of a T1 signal either AMI or B8ZS CONFIGURATION Under REPORTS displays the current Access T configuratio...

Страница 113: ...he equalization of a transmitted DSX 1 signal from the auxiliary port for cable length ES ERROR COUNT Number of ES in the user specified interval which will cause an ES alarm ES INTERVAL Interval duri...

Страница 114: ...dge NORMAL IP ADDRESS Defines Access T s IP address in dotted notation eg 192 203 128 186 LINE The T1 line network or the interface to the T1 line Under SOURCE a clock derived from the signal received...

Страница 115: ...for communication via the supervisory ports PASSWORD Password protection of the terminal interface which can be enabled or disabled via the supervisory craft or chain port of a master Access T PERMANE...

Страница 116: ...r password SET COMMUNITY NAME Defines the Access T community name for SET requests SETUP Enabling of alarm detecting and dialout SETS DISABLED Under SNMP disables Access T s ability to SET parameters...

Страница 117: ...f day map switching TIME TO LIVE Defines the default time to live values in seconds which is inserted into all outgoing IP datagram packets Time to live detemines how long the IP datagram will be pass...

Страница 118: ...s You have reached the end of a menu path when pressing the Enter key produces a report a dialog box or a drop down menu with an asterisk next to one of the selections A parameter in a drop down menu...

Страница 119: ...y changes to the following Dialog Boxes Dialog boxes appear at the end of a menu path when more than an Enter keystroke is required to set a parameter When a dialog box appears the cursor blinks at th...

Страница 120: ...rimarily using the arrow keys the Enter key and the Esc key This section provides the screen by screen steps for defining the line threshold parameters BPVs ES interval and ES errors The displays in t...

Страница 121: ...ing the key once Notice that the and markers identify the current Main Menu Line selection The display reads 3 Use the key to move the selection bar to THRESHOLD The display changes to ACST 0351 005 C...

Страница 122: ...splay changes to show additional line options 5 Press the key until the selection bar highlights the LINE option as shown in the previous display Press the Enter key Chapter 5 ACST 0351 005 The Termin...

Страница 123: ...the Enter key The display lists the possible values for this parameter An asterisk appears next to the currently selected value as follows 7 To change the BPV threshold to 10 8 press the key until th...

Страница 124: ...verifying the new selection 9 Press the Esc key to return to the previous menu 10 Press the key until the selection bar highlights the ES INTERVAL option The display reflects the new selection Chapte...

Страница 125: ...ith ENTERED to verify that the new value was accepted 13 Press the Esc key to exit the dialog box and return to the previous menu 14 Repeat Steps 10 through 13 for the ES ERRORS parameter 15 Press the...

Страница 126: ...include the system name the date and time the clock source the password the operation mode and the terminal interface communication parameters Setting the Communication Parameters Via the Craft Port T...

Страница 127: ...x for an Access T 100 200 and 400 units and DB25 interface cable 080 2603 0xx for an Access T 1500 2 Ensure that power is turned on at the terminal and Access T 3 Select the appropriate terminal type...

Страница 128: ...arity mode NONE EVEN or ODD Press the Esc key 7 Select XON XOFF and enable XON XOFF handshaking as appropriate Generally XON XOFF is not required If TABS is used XON XOFF must be DISABLED Press the Es...

Страница 129: ...t be configured as slaves The Access T to which the controlling terminal or NMS is attached must be configured as the master If an Access T 1500 module is to act as the master you must configure the m...

Страница 130: ...including its IP address trap manager address interface type etc Note Please read the Contraints of Operating Access T with SNMP section at the end of Chapter 1 before connecting to an SNMP manager I...

Страница 131: ...HENTICATION TRAP option The authentication trap option enables or disables Access T s ability to transmit an authitication trap if the community name on GET or SET requests is incorrect Select YES or...

Страница 132: ...rement 18 Select the CIRCUIT ID option A dialog box appears prompting you for the 10 character text string dsx1CircuitIdentifier value which will be used for troubleshooting purposes Press the Enter k...

Страница 133: ...nd of this chapter Selecting the TABS Node Address Whenever Access Ts are chained i e interconnected via their Chain Ports each Access T on the chain must be given a unique node address The node addre...

Страница 134: ...urrence To set the system date and time perform the following steps 1 Select SYSTEM from the Main Menu Line 2 Select the DATE TIME option 3 Select the DATE parameter The date dialog box will appear at...

Страница 135: ...Esc key 5 If the station clock option is selected in step 3 the frequency must be specified Select the FREQUENCY option and press the Enter key Pos sible frequency values will appear on screen Enter t...

Страница 136: ...ter key If other network equipment monitors ANSI T1 403 one second performance reports enable them by selecting ON Otherwise select OFF Press the Esc key Note T1 403 can be enabled only when FRAMING E...

Страница 137: ...orRS449 Select RS449 for an EIA 530 interface Press the Esc key 7 Move the cursor to RTS If the DTE does not support the RTS hand shaking signal select PERMANENT Otherwise select ACTIVE RTS con troll...

Страница 138: ...M YES for Port 1 is not valid if MASTER PORT1 Note If no DTE is connected to a DTE port ensure that TTM OFF before initiating a local CS DTE or remote CS Line loopback Both the Access T and the DTE mu...

Страница 139: ...rrently active map This command should only be used if you wish to send DTE port and mapping configurations to the far end Refer to Sending the DS0 Map to the Far End for more information The followin...

Страница 140: ...lse density is not assured in any other way e g B8ZS encoding Note Bit 7 stuffing causes errors in a transmitted QRSS signal Yellow Signal Transcoding When at least one DS0 is mapped to the Aux port a...

Страница 141: ...d to the auxiliary port and you want Access T to generate AIS toward the aux port AIS TO DTE must be enabled With AIS TO DTE enabled a Loss of Sync LOS or Loss of Frame LOF event from the line causes...

Страница 142: ...t data from the DTE port is over wirtten by the AIS To enable AIS generation to the line perform the following steps 1 From the Main Menu Line select DTE 2 Select AUX PORT 3 Select AIS TO LINE 4 Selec...

Страница 143: ...de 1 DTEPort1 2 DTE Port 2 3 DTE Port 3 4 DTE Port 4 A auxiliary T1 DTE port Pressing the and keys moves the cursor along the line of DS0s As you move across the DS0 selection bar Line 1 of the dialog...

Страница 144: ...cond TIME must be enabled as the current mapping option Note Access T must be in an ESF point to point application and only one Access T can be configured for TIME mode at a time To define the map swi...

Страница 145: ...ching of the DS0 map will not occur until the test is turned off Sending the DS0 Map to the Far End The SEND command SYSTEM DS0 CONFIGURATION SEND lets you transmit the currently active DS0 map to the...

Страница 146: ...thresholds are user specified Loss of RTS at the DTE ports Loss of master clock Internal communication failure Access T NIM failure When a user enabled alarm occurs the following things happen ALERT a...

Страница 147: ...age to be logged The format of the ALERT banner and other information about reporting to an ASCII terminal NMS or SNMP based manager are given under Principles of Alarm Reporting in Chapter 7 Note In...

Страница 148: ...erform the following steps 1 Select ALARMS from the Main Menu Line 2 Select SETUP 3 Alarms are monitored at different points in the system Select the type of alarm group DTE LINE AUX PORT or CHASSIS a...

Страница 149: ...ounted can be between 1 and 15 minutes For example if ES ERRORS 100 and ES INTERVAL 6 Access T will declare an alarm if it counts 100 Errored Seconds within the six minute interval To set the BPV and...

Страница 150: ...RFACE option is set to MODEM or DATAKIT Access T allows two dialstrings primary and alternate to be defined for alarm dialout Each dialstring can contain up to 36 characters Modemdialstringsmust begin...

Страница 151: ...eception of a valid ASCII character except if communicating via SLIP PPP When communicating via SLIP or PPP the inactivity timer is reset each time a proper IP packet is received When the inactivity t...

Страница 152: ...be comes inactive Terminate the entry by pressing the Enter key Press the Esc key twice Note The Start and Stop times must be different for dialout to occur If the user wants a dialstring to be activ...

Страница 153: ...ON CAUTION If an Inactivity Timeout of 0 is speci fied the dialed connection will remain in effect until the dialed device or modem disconnects 15 Select DIALPORT BACKOFF 16 Enter the Dialport Backoff...

Страница 154: ...lect YES to reset to the defaults or NO to return to the COMMANDS menu list Changing Interface Protocols Access T provides a simple method to switch between the Terminal TABS SLIP and PPP Interfaces o...

Страница 155: ...fly the flow chart can be summarized into the following scenarios 1 Access T is in protocol search mode One of the following can occur Access T receives a valid SLIP PPP packet Go to 2a A TABS command...

Страница 156: ...l Search Mode Go to Start Password Prompt DCD Search SLIP SLIP Terminal TABS Terminal TABS PPP PPP YES YES YES NO NO PASSWORD SLIP PASSWORD PPP PASSWORD DCD Lost or Inactivity Timeout Expired Logoff D...

Страница 157: ...SLIP Interface PASSWORD PPP invokes PPP interface Note Passwords are not equivalent to the authentica tion protocol 5 Access T regains its carrier DCD and invokes protocol search mode if passwords ar...

Страница 158: ...m of the display 4 Enter the new password name as prompted The password will not be echoed on the screen Terminate the password with by pressing the Enter key 5 At the RE ENTER THE SEVEN 7 CHARACTER P...

Страница 159: ...Logging On Logging on is required only for connections to the Supervisory Port and only when password protection is enabled If password protection is enabled and the terminal has been logged off foll...

Страница 160: ...orm the following steps 1 Select COMMANDS from the Main Menu Line 2 Select the LOG OFF option 3 At the confirmation prompt select YES to log off or NO to return to the Commands Menu If Access T is con...

Страница 161: ...rocedures These sections explain the ALARMS REPORTS and TEST menu paths Alarms Access T alarms which are defined and described in Chapter 2 can be Setup Viewed Cleared Displayed as history reports Thi...

Страница 162: ...apply to alarm dialout INTERFACE must be set to MODEM Dialout occurs only for alarm types specified by the user Access T dials out only if DCD is inactive no connection Access T automatically disconne...

Страница 163: ...end unsolicited alarm reports to a network management system in a modified TABS format For a more detailed descrip tion of the unsolicited TABS alarm reports refer to the Access T TABS Interface Manua...

Страница 164: ...of Signal SIGNAL LOSS Errored Seconds ES Loopback Override LOOP Loss of Sync SYNC LOSS DTE alarms Loss of RTS input to DTE Port n PORT n LOSS where n 1 4 To view a particular alarm s configuration fo...

Страница 165: ...y you wish to view DTE LINE AUX PORT or CHASSIS The alarm history report appears on the screen 4 Press the Esc key to exit the display Clearing the Alarm History The alarm history can be cleared in tw...

Страница 166: ...t YES or NO 5 Press the Enter key 6 Press the Esc key to return to the Main Menu Line Special procedures must be followed when handling alarms at a master Access T For a detailed explanation of how to...

Страница 167: ...ware part and serial numbers software part numbers and start up times for Access T Multiplexer and Network Interface Module NIM To display the Access T Description perform the following steps 1 Select...

Страница 168: ...ect REPORTS from the Main Menu Line 2 Select CONFIGURATION 3 Select LOCAL or FAR END report as appropriate Note The far end configuration is available only in point to point ESF framing mode 4 The rep...

Страница 169: ...ther Access T is in a DS DTE DS Line LS DTE or LS Line loopback QRSS Whether Access T is transmitting QRSS to the line and what portion of the bandwidth is being tested PORT1 PORT2 PORT3 PORT4 AUX FUL...

Страница 170: ...k Whether a CS Line or CS DTE loopback is in effect Interface Whether the DTE port interface is V 35 or RS449 RTS Whether Request To Send RTS is permanently asserted or controlled by the DTE active TT...

Страница 171: ...llow Signal from the T1 line If so the far end CSU has lost sync on the signal from the line Rcv AIS Whether Access T is receiving Alarm Indication Signal AIS an unframed All ONES signal Master Clk Lo...

Страница 172: ...dling configuration for MAP1 and MAP2 The start and stop times for MAP 1 and MAP 2 The currently active map indicated by an asterisk in front of the bundling string To view the DS0 Configuration Repor...

Страница 173: ...imeout Dialport backoff Definitions of each of these parameters can be found in Chapter 6 under Modem Dialout Configuration To display the Access T Modem Dialout Parameters report perform the follow i...

Страница 174: ...54016 User registers record performance of the input from the T1 line They can be accessed from the supervisory interfaces as well as the network and FDL and can be cleared from the supervisory interf...

Страница 175: ...in the current incomplete interval The number of valid complete intervals maximum of 96 reset at power up or when register is cleared Error counts for the total of valid intervals over the last 24 ho...

Страница 176: ...scribed in step 3 or press the Esc key to return to the register type prompt 7 Select another register type as described in step 2 or press the Esc key repeatedly to return to the Main Menu Line USER...

Страница 177: ...ives the register type User Telco Aux Port FDL Telco or FDL User parameter type name of the unit and time Line 2 of the report gives the number of seconds maximum 900 in the current incomplete interva...

Страница 178: ...24 Hour Registers command Note When FDL User is selected Access T sends an FDL command and does not wait for a response To verify that the far end registers have been cleared you must display the reg...

Страница 179: ...er the error count the report gives the date and time when the count was last cleared The maximum count is 65 535 The count does not roll over The ESF Error Count for the far end FDL offers a slightly...

Страница 180: ...F Errors command COMMANDS CLEAR ESF ERRORS The Telco ESF error count can be cleared from the network i e by the telco All ESF error counts are cleared at power up or when the framing mode is changed N...

Страница 181: ...ss T is in loopback or is transmitting a test signal Line availability is cleared when the User 24 hour registers are cleared To display the Line Availability perform the following steps 1 Select REPO...

Страница 182: ...T master clock Figure 7 11 illustrates the Buffer Error Count display Note Buffer Error Count will not increment due to Loss of Clock Source To see if the Buffer Error Count is escalating follow thes...

Страница 183: ...ing traps during alarm dialout SLIP or PPP Authentication Trap Whether Access T s ability to transmit an authentication trap is enabled or disabled PPPSupport Whether PPP support for Access T isenable...

Страница 184: ...g SET Community Name User defined string required on SNMP SET requests SETS Allowed Addresses Defines up to two IP addresses from which Access T will accept SET commands SET commands from any other IP...

Страница 185: ...each variable s counter can be found in RFC 1213 Variables not listed in these reports either always report a value of zero or are not supported by Access T Figure 7 13 illustrates and example of the...

Страница 186: ...tterns Loopbacks Access T loopbacks which are described in detail in Chapter 2 are divided into DTE side and line side loopbacks Loopbacks can be set for individual ports or lines This section provide...

Страница 187: ...erface Local Access T Far End Access T 1 1 9 3 7 5 8 2 4 6 1 2 1 2 1 2 1 2 9 9 9 9 CS DTE Remote CS Line DS DTE Remote LS Line LS DTE Remote DS Line CS Line DS Line LS Line T1 Line T1 Line Interface 3...

Страница 188: ...e received data path is disconnected from the network Likewise when an LS DTE or DS Line loopback is established the Access T cannot be the timing source MASTER LINE 2 When DS Line Loopback is initiat...

Страница 189: ...To establish a loopback from a terminal perform the following steps 1 Select TEST from the Main Menu Line 2 Select the appropriate loopback group PORT LOOP or LINE LOOP If you select PORT LOOP go to s...

Страница 190: ...e desired REMOTE UP or REMOTE DOWN line loopback LINE LS Line loopback controlled by in band code T1E1P Payload Loopback as defined in ANSI T1 403 DS Line loopback T1E1L Line Loopback as defined in AN...

Страница 191: ...s interruption of data However to determine whether a CS Line loopback exists at the far end tests must be performed in the specific port channel To perform the Remote Loop Verify test follow these st...

Страница 192: ...s time the words FAR LOOP SENT WAITING FOR VERIFICATION appears in the Menu and Report Display Area The test lasts about ten seconds after which time the display will display LOOP VERIFIED or NO LOOP...

Страница 193: ...me QRSS pattern invalid results can occur This rule applies to Remote Loop and Automatic Loop Verification also Note 3 Do not issue other commands such as Restart NIM Restart Mux or loopbacks while tr...

Страница 194: ...ransmitted Procedures are given in the section entitled Transmitting a Test Pattern 2 From the Main Menu Line select TEST 3 Move the cursor to BIT ERRORS and press the Enter key 4 To inject errors int...

Страница 195: ...om the Main Menu Line 2 Select the RESTART NIM option 3 At the confirmation prompt select YES to re initialize the NIM or NO to return to the COMMANDS menu CAUTION Restarting the NIM interrupts traf f...

Страница 196: ...all vali dation bytes If any errors are found in the validation bytes Access T resets the configuration to the system default values To re initialize the Mux perform the following steps 1 Select COMMA...

Страница 197: ...es for the Access T 1500 the module in slot 15 must be the master if the chassis is to have a master Refer to Chapter 3 for more information Note 2 When different Access T product groups are used in t...

Страница 198: ...he selected Access T For exam ple you can call up a 24 hour register report for the selected Access T Figure 8 1 summarizes the master and slave functions Master Access T Slave Access T Polling of sla...

Страница 199: ...ue in m XX the terminal is communicating directly with the master Otherwise the terminal is communicating with a slave When an ALERT indication appears after the node addresses in the Title Bar there...

Страница 200: ...t responding for that slave To communicate to slave units on the chain using SNMP you must make sure that the master unit has polling enabled for that slave and that the proper SNMP parameters are ena...

Страница 201: ...ode address 01 to 30 of the slave Then press the Enter key followed by the Esc key d Repeat substeps 6b and 6c for additional slaves as desired 7 Press the Esc key repeatedly to return to the Main Men...

Страница 202: ...to the slave and any configuration or diagnostics you select from the menus will be executed by the slave You continue to communicate with the selected node until you select another node or until you...

Страница 203: ...ES threshold configuration threshold and interval Aux ES threshold configuration threshold and interval Bit 7 stuffing In band loopback recognition Yellow Signal transcoding AIS to DTE and AIS to Line...

Страница 204: ...YES or NO under POLL and whether dialout will occur when the node does not respond YES or NO under DIAL To view the master polling configuration for a chain perform the following steps 1 Make sure tha...

Страница 205: ...node The date and time of the first and the most recent changes of respond ing status The initial and current responding status NORMAL for a responding node ALARM for a non responding node and DISABL...

Страница 206: ...tial Current Count 01 date time date time NORMAL NORMAL 0 02 date time date time NORMAL DISABLED 0 03 date time date time NORMAL NORMAL 2 04 date time date time NORMAL ALARM 1 05 date time date time N...

Страница 207: ...g which nodes currently have alarms As shown in Figure 8 5 the Node Alarm Status display lists each node by number identifies which nodes have uncleared alarms YES under ALARMS and indicates whether d...

Страница 208: ...ES YES 17 NO NO 03 YES NO 18 NO NO 04 NO NO 19 NO NO 05 NO NO 20 NO NO 06 NO NO 21 NO NO 07 NO NO 22 NO NO 08 NO NO 23 NO NO 09 NO NO 24 NO NO 10 NO NO 25 NO NO 11 NO NO 26 NO NO 12 NO NO 27 NO NO 13...

Страница 209: ...sponding If not go to step 3 If so take whatever action is necessary to allow the master to poll the non responding slave The problem may be caused by a faulty con nection to the slave or by a failure...

Страница 210: ...e steps 1 Turn off power and remove the power cord from the rear of the Access T 100 200 or 400 unit 2 Use a small flathead screwdriver to remove the fuse assembly from the rear of the unit Insert the...

Страница 211: ...e power cord and restore power to the unit Note If no spare fuse is inside the fuse assembly or if you wish to order extra fuses call Larscom and ask for part number 250 120 75 1 port or 2 port or 250...

Страница 212: ...wer supplies by loosening the thumbscrews at the top of the faceplate Then grasp the extractor handle at the bottom of the faceplate an pull b Remove the defective power supply by pulling on the handl...

Страница 213: ...CST 112 ACST 201 ACST 202 ACST 211 ACST 212 ACST 401 ACST 402 ACST 411 ACST 412 ACST 1500B xxxx 087 2101 001 xx PWR PS01 PWR PS03 A87 AK01 001 A87 AK02 001 Chassis with 1 DTE Port ac Chassis with 1 DT...

Страница 214: ...upervisory Cable DE9S to DB25P DTE DCE shielded straight Supervisory Cable DE9S to DB25P DTE DTE shielded crossover Supervisory Cable DE9S to DE9S DTE DTE shielded crossover Supervisory Cable DE9S to...

Страница 215: ...Santa Clara CA 95054 Include the following information with returned items Return authorization number Contact Larscom Customer Service Part number and serial number Detailed description of malfuncti...

Страница 216: ...the rfc1406 txt Z file to rfc1406 mib This directory also contains a README file which briefly describes the MIB files as well as Larscom s software liability position Packing For Shipment or Storage...

Страница 217: ...Shielded EIA530 to EIA530 Figure A 1 DTE Cable 080 2373 0xx 1 23 20 2 14 3 16 4 19 17 9 5 13 6 22 24 11 7 8 10 12 15 18 21 25 1 22 6 3 16 2 14 5 13 24 11 4 19 20 23 17 9 7 8 10 12 15 18 21 25 DB25P m...

Страница 218: ...Drain Wire Shield Wire Shield Wire Drain Wire 1 23 20 2 14 3 16 4 19 17 9 5 13 6 22 24 11 7 8 10 12 15 18 21 25 DB25P male DB25S female 1 22 6 3 16 2 14 5 13 24 11 4 19 20 23 17 9 7 8 10 12 15 18 21 2...

Страница 219: ...0xx Drain Wire Drain Wire 1 23 20 2 14 15 12 3 16 4 19 17 9 5 13 18 21 6 22 8 10 24 11 7 25 1 23 20 2 14 15 12 3 16 4 19 17 9 5 13 18 21 6 22 8 10 24 11 7 25 DB25P male DB25S female N C Shield Wire Sh...

Страница 220: ...0xx Drain Wire Shield Wire Shield Wire Drain Wire 1 23 20 2 14 15 12 3 16 4 19 17 9 5 13 18 21 6 22 8 10 24 11 7 25 1 23 20 2 14 15 12 3 16 4 19 17 9 5 13 18 21 6 22 8 10 24 11 7 25 DB25P male DB25P...

Страница 221: ...xx Drain Wire Shield Wire Shield Wire Drain Wire 24 11 2 14 3 16 17 9 20 4 5 6 7 8 10 12 13 15 18 19 21 22 23 25 V X R T P S U W E D C H B F J K L M N Y Z a b c d f g h i j k m n DB25P male M34S femal...

Страница 222: ...0xx Drain Wire Shield Wire Shield Wire Drain Wire 24 11 2 14 3 16 17 9 20 4 5 6 7 8 10 12 13 15 18 19 21 22 23 25 V X R T P S U W E D C H B F J K L M N Y Z a b c d f g h i j k m n DB25P male M34P male...

Страница 223: ...3 0xx Drain Wire Shield Wire Drain Wire 24 11 2 14 15 12 3 16 17 9 4 8 5 6 7 20 10 13 18 19 21 22 23 25 U W P S Y a R T V X C F D E B H J K L M N Z b c d f g h i j k m n DB25P male M34P male 1 A Shiel...

Страница 224: ...0xx Drain Wire Shield Wire Drain Wire 24 11 2 14 15 12 3 16 17 9 4 8 5 6 7 20 10 13 18 19 21 22 23 25 U W P S Y a R T V X C F D E B H J K L M N Z b c d f g h i j k m n DB25P male M34S female 1 A Shie...

Страница 225: ...eld Wire Drain Wire 1 23 20 2 14 15 12 3 16 4 19 17 9 5 13 18 21 6 22 8 10 24 11 7 25 1 30 12 4 22 5 23 6 24 7 25 8 26 9 27 10 14 11 29 13 31 17 35 19 18 2 3 15 16 20 21 28 32 33 34 36 37 DB25P male D...

Страница 226: ...Wire Drain Wire 1 23 20 2 14 3 16 4 19 17 9 5 13 6 22 24 11 7 8 10 12 15 18 21 25 1 29 11 6 24 4 22 9 27 17 35 7 25 12 30 8 26 19 2 3 5 10 13 14 15 16 18 20 21 23 28 31 32 33 34 36 37 DB25P male DC37...

Страница 227: ...Wire Drain Wire 1 23 20 2 14 3 16 4 19 17 9 5 13 6 22 24 11 7 8 10 12 15 18 21 25 1 29 11 6 24 4 22 9 27 17 35 7 25 12 30 8 26 19 2 3 5 10 13 14 15 16 18 20 21 23 28 31 32 33 34 36 37 DB25P male DC37S...

Страница 228: ...ield Wire Drain Wire Shield Wire 1 23 20 2 14 15 12 3 16 4 19 17 9 5 13 18 21 6 22 8 10 24 11 7 25 1 30 12 4 22 5 23 6 24 7 25 8 26 9 27 10 14 11 29 13 31 17 35 19 18 2 3 15 16 20 21 28 32 33 34 36 37...

Страница 229: ...gure A 13 Supervisory Cable 080 2463 0xx Shield Wire 2 5 3 1 4 7 8 6 9 2 7 3 4 5 8 20 6 9 10 11 12 13 14 15 16 17 18 19 21 22 23 24 25 DE9S female DB25S female 1 Shield Wire ACST 0351 005 Appendix A J...

Страница 230: ...14 Supervisory Cable 080 2313 0xx Shield Wire 1 2 3 4 5 7 8 6 9 8 3 2 20 7 4 5 6 9 10 11 12 13 14 15 16 17 18 19 21 22 23 24 25 DE9S female DB25P male N C 1 Shield Wire Appendix A ACST 0351 005 Cable...

Страница 231: ...igure A 15 Supervisory Cable 080 2383 0xx Shield Wire Shield Wire 2 5 3 1 4 7 8 6 9 2 7 3 4 5 8 20 6 9 10 11 12 13 14 15 16 17 18 19 21 22 23 24 25 DE9S female DB25P male 1 ACST 0351 005 Appendix A Ju...

Страница 232: ...DE9S Shielded Crossover Figure A 16 Supervisory Cable 080 2393 0xx Shield Wire Shield Wire 2 5 3 1 4 7 8 6 9 3 5 2 1 4 7 8 6 9 DE9S female DE9S female Appendix A ACST 0351 005 Cable Drawings June 1996...

Страница 233: ...rossover Figure A 17 Line Cable 080 2293 0xx 1 9 3 11 12 15 2 4 5 6 7 8 10 13 14 3 11 1 9 12 15 2 4 5 6 7 8 10 13 14 DA15S female DA15S female 3 Drain Wires 3 Drain Wires ACST 0351 005 Appendix A June...

Страница 234: ...d Figure A 18 Line Cable 080 2283 0xx 1 9 3 11 12 15 2 4 5 6 7 8 10 13 14 1 9 3 11 12 15 2 4 5 6 7 8 10 13 14 DA15S female DA15S female 3 Drain Wires 3 Drain Wires Appendix A ACST 0351 005 Cable Drawi...

Страница 235: ...DA15S Shielded Figure A 19 Line Aux Cable 080 2503 0xx 1 9 3 11 12 15 2 4 5 6 7 8 10 13 14 1 9 3 11 12 15 2 4 5 6 7 8 10 13 14 DA15P male DA15S female ACST 0351 005 Appendix A June 1996 Cable Drawings...

Страница 236: ...yed Shielded Figure A 20 Line Cable 080 2523 0xx 1 9 3 11 2 4 5 6 7 8 10 12 13 14 15 5 4 1 2 3 6 7 8 DA15S female Keyed RJ 48 WHT RED BLK BLK Drain Wire Shield Appendix A ACST 0351 005 Cable Drawings...

Страница 237: ...Shielded Crossover Figure A 21 Line Cable 080 2553 0xx 1 9 3 11 2 4 5 6 7 8 10 12 13 14 15 2 1 5 4 3 6 7 8 DA15P male Keyed RJ 48 WHT RED BLK BLK Drain Wire Shield ACST 0351 005 Appendix A June 1996 C...

Страница 238: ...yed Shielded Figure A 22 Line Cable 080 2563 0xx 1 9 3 11 2 4 5 6 7 8 10 12 13 14 15 5 4 1 2 3 6 7 8 DA15S female Unkeyed RJ 48 WHT RED BLK BLK Drain Wire Shield Appendix A ACST 0351 005 Cable Drawing...

Страница 239: ...40 16 41 17 42 5 30 6 31 7 32 18 43 19 44 20 45 27 2 31 6 35 10 39 14 43 18 47 22 1 26 5 30 9 34 13 38 17 42 21 46 27 2 31 6 1 26 5 30 35 10 39 14 43 18 47 22 9 34 13 38 17 42 21 46 27 2 31 6 35 10 1...

Страница 240: ...0 16 41 17 42 5 30 6 31 7 32 18 43 19 44 20 45 27 2 31 6 35 10 39 14 43 18 47 22 1 26 5 30 9 34 13 38 17 42 21 46 27 2 31 6 1 26 5 30 35 10 39 14 43 18 47 22 9 34 13 38 17 42 21 46 27 2 31 6 35 10 1 2...

Страница 241: ...Shielded Crossover Figure A 25 Supervisory Cable 080 2603 0xx Shield Wire Drain Wire Drain Wire Shield Wire 1 2 3 4 5 7 8 20 1 3 2 4 5 7 8 20 DB25P male DB25P male ACST 0351 005 Appendix A June 1996...

Страница 242: ...Shielded Crossover Figure A 26 Supervisory Cable 080 2613 0xx Shield Wire Drain Wire Drain Wire Shield Wire 1 2 3 4 5 7 8 20 1 3 2 4 5 7 8 20 DB25P male DB25S female Appendix A ACST 0351 005 Cable Dra...

Страница 243: ...3 0xx 1 2 7 3 4 5 6 8 20 9 10 11 12 13 14 15 16 17 18 19 21 22 23 24 25 1 2 7 3 4 5 6 8 20 9 10 11 12 13 14 15 16 17 18 19 21 22 23 24 25 DB25P male DB25S female N C Drain Wire Shield Wire Shield Wire...

Страница 244: ...33 0xx 1 2 7 3 4 5 6 8 20 9 10 11 12 13 14 15 16 17 18 19 21 22 23 24 25 1 2 7 3 4 5 6 8 20 9 10 11 12 13 14 15 16 17 18 19 21 22 23 24 25 DB25P male DB25P male N C Drain Wire Shield Wire Shield Wire...

Страница 245: ...arm Alternate Mark Inversion AMI AMI is a form of line coding for T1 spans that requires consecutive pulses ONES to alternate between positive and negative ANSI T1 403 T1E1 The performance monitoring...

Страница 246: ...is any second with from 2 to 319 CRC 6 errors and no OOF condition In D4 mode Access T declares a BES if from 2 to 319 BPVs are detected without an OOF condition Bursty Errored Seconds are not counte...

Страница 247: ...dectection feature It also provides access to the unit if passwords are forgotten Cylic Redundancy Check CRC A logical check performed on data to see if an error has occurred in the transmitted data T...

Страница 248: ...Count ES Count BES Count UAS Count SES AND AND AND 10 consecutive 10 consecutive Declare USS Clear USS Unavailable Signal State USS Yes Yes Yes No No Yes NOTES USS begins with the first of 10 consecut...

Страница 249: ...s T Errored Second ES In ESF mode a second containing one or more CRC 6 errors or an Out of Frame OOF condition This parameter is defined for the ESF mode in AT T Publication 54016 In D4 mode Access T...

Страница 250: ...e for various cable lengths and conditions between CSUs and the first telco line repeater Line Coding The method of encoding data for transmission over a particular facility Line coding schemes for T1...

Страница 251: ...is formula allows the maximum number of ZEROS to be 15 and a minimum pulse density of about 12 5 1 in 8 Multiplexer A device that combines two or more signals for transmission over a single facility M...

Страница 252: ...in each DS0 in every 6th frame for signalling purposes Robbing of these bits has no significant affect on the quality of voice transmission Severely Errored Second SES A second with 320 or more CRC er...

Страница 253: ...e accessed from the network as well as from the supervisory interfaces but can be cleared only from the network or by restarting the NIM Terminal Interface The Terminal Interface provides drop down me...

Страница 254: ...nnot be accessed or cleared from the network Thus user registers allow the user to monitor and document network performance independent of the telco Yellow Signal A Yellow Signal is transmitted to the...

Страница 255: ...erate in half duplex mode i e data may be transmitted in only one direction at a time Data received by any port is transmitted by the other two ports Figure C 1 shows a basic application in which one...

Страница 256: ...PRI Glows red when the primary RS232 C port is receiving data SEC Glows red when the secondary RS232 C port is receiving data RS485 Glows red when the RS485 port is receiving data COLL Glows red when...

Страница 257: ...t Panel Network Management System CP01 CP01 Access T Access T Access T Access T RS 232 RS 232 RS485 RS485 Up to 30 chained units TNDS CP01 Chain Port Expander POWER ON PRI PRI DCE DCE DTE DTE SEC SEC...

Страница 258: ...y placing it so the hook and loop fastener strips make contact then pressing gently Wiring Connections Make RS232 C RS485 and power connections to the CP01 Chain Port Expander as follows 1 Connect the...

Страница 259: ...modem cable to assert control signals 3 Connect 9 Volts dc power to the POWER INPUT mini phone jack Specifications Specifications for the CP01 Chain Port Expander are given in Table C 1 Table C 1 CP01...

Страница 260: ...not be established across data link FAR LOOP SENT WAITING FOR VERIFICATION A command to engage a loopback has been attempted FAR UNLOOP SENT WAITING FOR VERIFICATION A command to disengage a loopback...

Страница 261: ...t the current settings conflict each other INVALID PARAMETER PASSED REQUESTED OPERATION IGNORED The software parameters have been configured in such a way that the current settings conflict each other...

Страница 262: ...NGS IN CONFLICT Unsol and passwords cannot be enabled at the same time WAITING FOR VERIFICATION Access T is attempting to establish the requested loopback fo ACST 0351 005 Appendix D June 1996 Access...

Страница 263: ...inch Patch Panel A87 AK07 001 Panel cable combination used to convert the two female 50 pin aux connectors on the rear panel of the Access T 1500 to 15 RJ 48C connectors Includes mounting ears for 19...

Страница 264: ...however the Access T 1500 connectors require only 4 of these wires Figure E 1 shows the front and rear panel of the patch panel Provided with the patch panel is a custom converter cable 087 2143 001 f...

Страница 265: ...nches of rack space one rack position 2 The patch panel includes a pair of mounting ears which support either 19 inch or 23 inch equipment racks Using the hardware pro vided install the mounting ears...

Страница 266: ...patch panel around each of the cable connectors 8 Connect the T1 line or aux connectors to the RJ 48 jacks Note Jack numbers on the front of the Patch Converter Panel do not reflect actual Access T 15...

Страница 267: ...ur specific application Larscom recommends that you use 14 AWG wire for your connections To make wiring connections follow these steps 1 Insert wires by hand into the desired pin position on the conne...

Страница 268: ...1213 with the following restrictions No component of an object ID can have a value larger than 127 except for the Larscom enterprise number 555 Row insertion in tables is not supported MIB II variabl...

Страница 269: ...nfiguration this field returns the following Larscom Access T 1 Port MUX S W part number Larscom Access T 1 Port aux MUX S W part number Larscom Access T 2 Port MUX S W part number Larscom Access T 2...

Страница 270: ...are changed after power up sysName This read write object is an administratively assigned name for Access T The field is limited to 8 characters SETs exceeding this length limitation result in a badV...

Страница 271: ...ifInDiscards ifInErrors ifInUnknownProbs ifOutOctets ifOutUcastPkts ifOutNucastPkts ifOutDiscards ifOutErrors ifOutQLen ifSpecific Objects marked with an asterisk are not supported and return a value...

Страница 272: ...Line 4 Aux 5 DTE Port 1 6 DTE Port 2 7 DTE Port 3 8 DTE Port 4 Note Index value 1 is allocated for a non existent ethernet interface to make implementation consistent with the Larscom Proxy Agent and...

Страница 273: ...T SLIP interface the value is 1006 For all other interfaces the returned value is always 0 ifSpeed This read only object identifies the interface s current data flow capacity For SLIP PPP the returne...

Страница 274: ...port unit down 2 ifOperStatus This read only object provides the current state of the interface The only possible values are ifIndex value MIB Value 1 down 2 2 up 1 3 up 1 4 up 1 if unit has an aux d...

Страница 275: ...nt for Access T SNMP have null values i e 0 The IP group contains the following elements ipForwarding ipDefaultTTL ipInReceives ipInHdrErrors ipinAddrErrors ipForwDatagrams ipInUnknownProtos ipInDisca...

Страница 276: ...ly object provides the total number of input datagrams received from the SLIP PPP interface including those received in error ipOutRequests This read only object provides the total number of datagrams...

Страница 277: ...r This read only object provides the IP address of Access T ipAdEntlfIndex This read only object provides an index value that uniquely identifies the interface to which the addressing information pert...

Страница 278: ...ipAdEntReasMaxSize This read only object is the same as ifMtu for PPP SLIP which is 1500 for a PPP interface 1006 for a SLIP interface and 0 for all other interfaces ipRouteTable This table is empty f...

Страница 279: ...Msgs icmpInErrors icmpInDestUnreachs icmpInTimeExcds icmpInParmProbs icmpInSrcQuenchs icmpInRedirects icmpInEchos icmpInEchoReps icmpInTimestamps icmpInTimestampsReps icmpInAddrMasks icmpInAddrMaskRep...

Страница 280: ...ation Unreachable messages received by Access T icmpInTimeExcds This read only object provides the number of ICMP Time Exceeded messages received by Access T icmpInParmProbs This read only object prov...

Страница 281: ...ccess T icmpInEchoReps This read only object provides the number of ICMP Echo Reply messages received by Access T icmpInTimestampReps This read only object provides the number of ICMP Timestamp Reply...

Страница 282: ...nt to the implementation and operation of the UDP The UDP Group contains the following elements udpInDatagrams udpOutDatagrams udpNoPorts udpInErrors udpTable udpInDatagrams This read only object prov...

Страница 283: ...cation is currently accepting data grams i e UDP listener information There are only 2 entries in the table udpLocalAddress This read only object provides the Access T local IP address For Access T th...

Страница 284: ...ersions snmpInBadCommunityNames snmpInBadCommunityUses snmpInASNParseErrs snmpInTooBigs snmpInNoSuchNames snmpInBadValues snmpInReadOnlys snmpInGenErrs snmpInTotalReqVars snmpInTotalSetVars snmpInGetR...

Страница 285: ...version snmpInBadCommunityNames This read only object provides the total number of SNMP PDUs delivered to Access T which used an SNMP community name not known to Access T snmpInBadCommunityUses This r...

Страница 286: ...epted and processed by Access T snmpOutTooBigs This read only object provides the total number of SNMP OutTooBigs which have been accepted and processed by Access T snmpOutNoSuchNames This read only o...

Страница 287: ...ject provides the total number of SNMP Trap PDUs which have been generated by Access T snmpEnableAuthenTraps This read write object indicates whether the SNMP agent is permitted to gener ate authentic...

Страница 288: ...sion Group which is described in Appendix F Access T supports the following DS1 MIB objects dsx1ConfigTable dsx1CurrentTable dsx1IntervalTable dsx1TotalTable dsx1FarEndCurrentTable dsx1FarEndIntervalT...

Страница 289: ...to ifIndex 3 dsx1TimeElapsed This read only object provides the number of seconds since the beginning of Access T s current error measurement period dsx1Validlntervals This read only object provides t...

Страница 290: ...S Line Loopback request dsx1SendPayLoadCode 3 Sending DS Line Loopback request dsx1Send ResetCode 4 Sending loopback termination request dsx1SendQRS 5 Sending QRSS test pattern dsx1Circuitldentifier T...

Страница 291: ...condition and Yellow Signal TYEL will be generated thus the dsx1LineStatus value will be 64 32 4 100 dsx1SignalMode This read write object indicates the signaling method used between the local and far...

Страница 292: ...F standards will depend on the current dsx1Dfl value The dsx1Fdl is a bit mapped variable i e the value returned will be the total of the MIB values For instance when Access T is configured for ANSI T...

Страница 293: ...the previous 24 hour interval The past 24 hours are divided into 96 15 minute intervals The table has four instances one for each DS1 line interface dsx1IntervalIndex This read only object identifies...

Страница 294: ...d preceding the current interval The table has four instances one for each DS1 line interface dsx1Totallndex This read only object identifies the DS1 x line interface It is equal to ifIndex 3 which is...

Страница 295: ...ovides the number of previous intervals for which valid data has been collected at the far end Access T The value will be 96 unless the interface was brought online with the last 24 hours Otherwise th...

Страница 296: ...val It is a number between 1 and 96 where 1 is the most recently completed 15 minute interval and 96 is the least recently completed interval assuming that all 96 intervals are valid dsx1FarEndlnterva...

Страница 297: ...le provides the following statistics dsx1TotalESs read only dsx1TotalSESs read only dsx1TotalSEFSs Not applicable returns 0 dsx1TotalUASs read only dsx1TotalCSSs Not applicable returns 0 dsx1TotalPCVs...

Страница 298: ...lues are MIB Values Description 0 DS0 channel is unmapped or idlef 4 DS0 channel is mapped to the Aux 5 DS0 channel is mapped to DTE Port 1 6 DS0 channel is mapped to DTE Port 2 7 DS0 channel is mappe...

Страница 299: ...abled to generate an SNMP trap Note 2 Only one trap manager is supported at one time If no IP address is assigned for a trap manager trap messages are disabled The destination UDP port is fixed at 162...

Страница 300: ...ed the system up time may not be accurate if the date and time values are changed after power up Enterprise Specific Traps When a generic trap is enterpriseSpecific the specific trap field of the trap...

Страница 301: ...TS on DTE port 2 is detected 22030 No Master Clock loss 22031 Master Clock loss 22040 Network Interface Module NIM responding 22041 Network Interface Module NIM not responding 22050 Yellow Signal no l...

Страница 302: ...2160 Loss of RTS on DTE port 3 is no longer detected 22161 Loss of RTS on DTE port 3 is detected 22170 Loss of RTS on DTE port 4 is no longer detected 22171 Loss of RTS on DTE port 4 is detected 22180...

Страница 303: ...he packet is discarded LCP Beforea link can be used thetwo ends mustnegotiatecertainsettingsor options The protocol used for this negotiation is called the Link Control Protocol LCP LCP packets are en...

Страница 304: ...s this option on both receive and transmit Note that only the IP protocol can be reduced Address and Control Field Compression When negoti ated the address and control field can be omitted Access T su...

Страница 305: ...7 Automatic baud detection 4 6 6 2 Automatic verification 7 32 Aux port 2 13 3 13 6 15 B B8ZS 1 8 2 11 2 14 Bipolar violation BPV 1 4 2 16 7 15 Bipolar violations BPV 2 18 Bit 7 stuffing 2 14 6 13 6 1...

Страница 306: ...7 20 ESF framing 1 8 1 9 1 11 to 1 14 6 11 ESF performance parameters 1 12 1 13 EXIT function 5 4 6 10 Expander port 2 9 3 20 F Facility data link FDL 1 9 1 13 2 14 Far end loobacks 7 28 FCC rules par...

Страница 307: ...5 9 3 NIM restart 7 35 Nodes 2 4 8 3 8 4 8 6 to 8 8 8 10 to 8 13 Addresses 8 3 Alarm history 8 13 Alarm status 8 10 to 8 13 Configuration 8 8 Selecting 8 13 Viewing configuration 8 8 O One hour statis...

Страница 308: ...9 3 20 6 3 System configuration 6 3 6 9 System defaults 6 29 System name 6 8 T T1 Overview 1 3 Signal characteristics 1 4 TAB key 5 4 TABS address 6 8 TABS interface 2 5 2 6 2 17 6 8 7 3 TCP IP 1 20 t...

Страница 309: ...In the Notice to U S Users item 2 third bullet the facility code numbers have changed Replace the facility code numbers with the following The facility code 04DU9 BN 04DU9 DN 04DU9 1KN 04DU9 1SN Page...

Страница 310: ...ill illuminate red Note If two power supplies are installed but only one is powered the unpowered supply s power LED will illuminate red This is normal operation and does not indicate that the un powe...

Страница 311: ...ysical appearance To identify the type of unit you have look at the model number label located on the side of the Access T chassis Please make notes on the appropriate manual pages referencing this su...

Страница 312: ...procedure on how to disable span power for Access T 100 S and Access T RDL Verifiying a Remote Loop Provides information on the preferred method for verifying a remote loopback using Access T 100 S an...

Страница 313: ...s T to the equipment rack To rack mount the Access T 100 S or Access T RDL with the dual rack mount tray 1 Using a Phillips screwdriver secure the Access T mounting tray to the equipment rack Be sure...

Страница 314: ...acks 0o to 50o C Up to 95 relative humidity noncondensing Meets FCC requirements Parts 15 and 68 FCC registration number GRPUSA 73975 DE N Figure 1 Access T 100 S and Access T RDL Front Panel Figure 2...

Страница 315: ...both the master and slave units are Access T 100 S Access T 100 S and Access T RDL do not display an on screen Alert if they are the master of a chain and a slave unit is removed from the chain The Ch...

Страница 316: ...ully clip the wire jumper and bend it back slightly to ensure there is no contact 4 Replace the top cover and secure it in place with the screws Verifiying a Remote Loop The remote loopback AUTO VERIF...

Страница 317: ...Figure 1 Location of Jumper J4 Front Back J4 ACST 0351 S53 Larscom Incorporated December 1996 Supplement 3 ACST 0351 005 7...

Страница 318: ...nagement and perform ance information As the FT1s are cross connected into a single T1 each of these individual management paths is terminated and a new management informa tion path is generated for t...

Страница 319: ...d at DCS FDL Terminated at DCS RDL Maintained Through Network New FDL Generated by DCS New FDL Generated by DCS FT1 with 12 DS0s FT1 with 12 DS0s FT1 with 12 DS0s FT1 with 12 DS0s FT1 with 8 DS0s FT1...

Страница 320: ...or 2 5 seconds RDL Data Rates The RDL takes a portion of the bandwidth from the FT1 payload The RDL data stream is sent and received over the line but does not appear at the DTE port This means that t...

Страница 321: ...low the rate as set in the current map The clock signals both transmit and receive sent to the DTE port by the Access T will be gapped with the gap occurring at the RDL bit position In other words the...

Страница 322: ...Telco and FDL User registers the only difference is that the information is requested and received via the RDL rather than the FDL RDL Local and RDL Remote Registers The RDL Local and RDL Remote regi...

Страница 323: ...co User Records performance of input from the T1 line at the local Access T RDL Can be cleared by the user Aux Records performance of input to the Aux port from a T1 DTE at the local Access T RDL Can...

Страница 324: ...the RDL loopback is a Payload DS Line Loopback and conforms to the characteristics defined in AT T Publication 54016 However because of the functionality of the RDL this loopback provides true end to...

Страница 325: ...REMOTE REPORTS ONE HOUR STATISTICS RDL TELCO REPORTS ONE HOUR STATISTICS RDL USER REPORTS ESF ERROR COUNT RDL TELCO REPORTS ESF ERROR COUNT RDL USER Far end configuration display via RDL Far end descr...

Страница 326: ...o work this new DS0 configuration must be sent to the remote end Send now Y N Entering Y immediately sends the new DS0 configuration to the far end Access T For complete instructions on DS0 configurat...

Страница 327: ...all continue in full force and effect 5 Ownership of Licensed Materials Licensed Materials remain the sole and exclusive property of Larscom Incorporated By removing the Products from the package s an...

Страница 328: ...ution Downloading through the chain port supports an all in one flash download If all your Access Ts along the chain are not identical downloads to the individual modules should be made via the indivi...

Страница 329: ...Note The Access T 100 S and Access T 100 RDL sup port modem connection only PC with male DB25 connector to Access T Series 200 400 or 01 02 cable 080 2463 PC with female DB25 connector to Access T Se...

Страница 330: ...System Configu ration in Chapter 6 of the Access T Installation and Operation manual ACST 0311 xxx 5 Usingthedrop downmenusasdescribedintheAccess Tmanual setthe Access T SUPV PORT Supervisor Port for...

Страница 331: ...ollowing display of command options Commands are invoked by entering the letter which is capitalized in the display Commands can be entered in upper or lower case Pressing the Enter key is not require...

Страница 332: ...atedialstring usually ATD followedbythetelephonenumberofthereceivingend todialthe modem Terminate the entry by pressing the Enter key Note Verify that the modem at the Access T site is configured prop...

Страница 333: ...s TABS statistics for debugging purposes card_resTart This command is not currently supported ed secU This command is not currently supported Whole download Downloads both NIM and Mux software Prompt...

Страница 334: ...d If the cable is attached to the Craft port the automatic baud rate detection feature will be executed to determine the correct baud rate when enabled 3 Select the Chain Port address If you are downl...

Страница 335: ...to the Craft port the automatic baud rate detection feature will be executed to determine the correct baud rate 3 Set the Chain Port address Set the Chain Port address to 0 Enter A and type 00 at the...

Страница 336: ...scom Manufacture Download Enter 1 for single card 2 for multi card 3 for all internal download 4 for single unit internal download To download from the Access T master to all Access T slaves on the ch...

Страница 337: ...address to 0 Enter A and type 00 at the prompt followed by the Enter key 4 Start the software download Enter W Whole download The down load will take approximately 15 minutes at 9600 baud Go to Comple...

Страница 338: ...show no activity then several messages will be displayed Disregard the message Failed to get proper response For the rest of the download a block counter will increment as software is downloaded Duri...

Страница 339: ...des modems enter E and respond as prompted with the appropriate escape string usually used to get the attention of the modem Terminate the entry by pressing the Enter key Then enter H and respond as p...

Страница 340: ...uipment Have surplus equipment taking up shelf space We ll give it a new home Learn more Visit us at artisantg com for more info on price quotes drivers technical specifications manuals and documentat...

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