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dsx1LineCoding

This read-write object selects or indicates the DS1 line coding. Changing this
object changes the coding for the Access-T DS1 line interface.

MlB Values

Description

dsx1B8ZS (2)

B8ZS

dsx1AMI (5)

AM I

other (6)

AMI, Bit 8 Stuffed

dsx1SendCode

This read-write object selects or indicates the code being sent across the DS1
interface to the far-end Access-T.

MIB Values

Description

dsx1SendNoCode (1)

Sending normal data

dsx1SendLineCode (2)

Sending LS-Line Loopback request

dsx1SendPayLoadCode(3) Sending DS-Line Loopback request
dsx1Send ResetCode (4)

Sending loopback termination request

dsx1SendQRS (5)

Sending QRSS test pattern

dsx1Circuitldentifier

This read-write object contains a 20 character identifier used for troubleshoot-
ing.

dsx1LoopbackConfig

This read-write object provides the loopback state of the line. Possible values
are:

MIB Values

Description

dsx1NoLoop (1)

No loopback established

dsx1PayloadLoop (2)

DS Line loopback established

dsx1LineLoop (3)

LS Line loopback established

dsxOtherLoop (4)

LS or DS DTE loopback established

ACST-0351-005

Appendix G

June 1996

Access-T DS1 MIB Support

G–3

Summary of Contents for Access-T 100

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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