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General DataComm SpectraComm 553, Инструкция по установке и эксплуатации

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Tests

Channel Tests

4-18

SpectraComm 553 Fractional T1 DSU

076R155-000

Installation and Operation Manual

Issue 7

Channel Local Loop

Channel Local Loop commands the DSU to loop data back to the DTE at the channel interface. 
Local Loopback checks everything up to the channel interface. During this test the DSU clamps the 
channel data it transmits to the T1 link to marks.

Local Loop can be commanded by means of the terminal interface, by SNMP control, by means of 
front panel switches, or by the LL lead (Pin 18) of the DTE interface.

Figure 4-20

Channel Local Loop

Note

Tests cannot be performed by means of front panel switches when the front panel has been inhibited by 
an SNMP controller or by the terminal interface. Front panel enabled is the default condition.

The DTE interface LL lead can only command Local Loop if Channel EIA Test Leads has been enabled 
by an SNMP controller or by the terminal interface. The default condition is disabled.

SC 553 DSU

DTE
Inter-
face

Framer

TX
Driver

Analog
Receiver

553

OOF NS

INS

ON

L

I

N
E

I

N

O
U

T

RSP

SD

RD

EQ

BPV

AIS

TM

ALM

CH

T1

RL

TX

RX

M
O
N

DTE

or

Test

Device

2. TM indicator On while Local Loop is active.

1. To start test from front panel, press CH momentary
     action switch.
     CH indicator is lit during the test.
     

     Press switch again to end the test.

3. Enter test data at the DTE. Compare data entered at
    the DTE with data looped back and displayed by the
    DTE. (Test equipment can be connected in place of
     the DTE.

Содержание SpectraComm 553

Страница 1: ...6SHFWUD RPP 886 Fractional T1 DSU Installation Operation Manual 076R155 000 Issue 7 April 2002 ...

Страница 2: ...l brand or product names are trademarks or registered trademarks of their respective companies or organizations Documentation Revision History GDC P N 076R155 000 Related Publications REV is the hardware revision 000 001 etc VREF is the most current software version V400 is Version 4 0 0 In addition to the publications listed above always read Release Notes supplied with your products Issue Number...

Страница 3: ...e current Contact General DataComm for updated information on this or other General DataComm products General DataComm Inc Technical Publications Department 6 Rubber Avenue Naugatuck Connecticut USA 06770 Tel 1 203 729 0271 Manual Organization The online web based manual uses active areas which allow you to navigate through portions of the manual by clicking on any blue text This manual is divided...

Страница 4: ...otentially hazardous voltages are present Always use caution and common sense Repairs must be performed by qualified service personnel only To reduce the risk of electrical shock do not operate equipment with the cover removed Never install telephone jacks in a wet location unless the jack is designed for that location Never touch uninsulated telephone wires or terminals unless the telephone line ...

Страница 5: ...valent Connection of this equipment to party lines and coin telephones is prohibited A label on the component side of the unit s printed circuit board provides the FCC Registration number for the unit If requested give this information to the telephone company To connect the product to the Public Telephone Network you are required to give the following information to the telephone company FCC Regi...

Страница 6: ...termination on an interface may consist of any combination of devices subject only to the requirement that the sum of the Ringer Equivalence Numbers of all the devices does not exceed 5 Electromagnetic Compatibility This Class A digital apparatus complies with Canadian ICES 003 Avis D industrie Canada L étiquette d Industrie Canada identifie le matériel homologué Cette étiquette certifie que le ma...

Страница 7: ... une interface téléphonique peut consister en une combinaison de quelques dispositifs à la seule condition que la somme d indices d équivalence de la sonnerie de tous les dispositifs n excède pas 5 La Compatibilité d Eléctro magnetique Cet appareil numerique de la classe A est conforme a la norme NMB 003 du Canada EC Declaration of Conformity Safety EN 60950 1997 A1 through A7 Low Voltage Directiv...

Страница 8: ...lephones Faxes Naugatuck Connecticut 06770 USA 1 800 243 1030 1 203 723 5012 1 888 248 4825 1 203 729 7611 http www vitalnetsvc com 1 203 729 2461 VITAL Network Services Regional Sales and Service Offices North American Region Office 6 Rubber Avenue Naugatuck Connecticut 06770 USA Telephones 1 800 243 1030 1 888 248 4825 1 203 729 2461 1 800 361 2552 French Canadian Training 1 203 729 2461 Faxes 1...

Страница 9: ...ng 2 4 Installation Procedures 2 4 Module Installation Procedures 2 4 Business Equipment Connections DTE 2 4 EIA 530 Card Installation 2 5 Network Connection 2 6 Station Clock Cascade Port Connection 2 7 Electrical Power Connection 2 7 External Alarm Indication SC 2000 shelf Only 2 7 DSU Addressing 2 7 Timing Options 2 8 Dedicated Remote Wake up Procedure 2 8 Preoperational Check 2 9 Local Test Se...

Страница 10: ...Test 4 8 T1 Local Test with Self Test 4 10 T1 Local Test 4 11 Channel Tests 4 13 Channel Self Test End to End 4 13 Channel RDL with Self Test 4 13 Channel Remote Digital Loop 4 15 Channel Digital Loop 4 17 Channel LL with Self Test 4 17 Channel Local Loop 4 18 DS0 Tests 4 19 DS0 Self Test End to End 4 19 Circuit Delay 4 19 DS0 Loopback 4 20 Appendix A Technical Characteristics Appendix B Interface...

Страница 11: ...eive Data No Transitions C 3 Transmit Data No Transitions C 3 Other Alarms C 3 EEPROM Checksum Error C 3 Unit Failure C 4 Unsolicited Test C 4 Power Up C 4 Configuration Change C 4 Top Supply Fail C 4 Bottom Supply Fail C 4 Remote Not Responding C 4 Redundant Mode C 4 Appendix D Timing Options Overview D 1 Timing Option Descriptions D 1 Slave Timing D 3 Internal Timing D 4 Channel Timing External ...

Страница 12: ...x SpectraComm 553 Fractional T1 DSU 076R155 000 Installation and Operation Manual Issue 7 Table of Contents ...

Страница 13: ...o forms Simple Network Management Protocol SNMP control or terminal interface control Both types of control can be extended from a master DSU installed at a central site to its dedicated remote DSU A SpectraComm Manager SCM card has to be installed with the DSU in an SC 5000 shelf or a MultiPak enclosure at the central site to provide communication and interface functions SNMP control which requir...

Страница 14: ...alarm reporting and diagnostic testing capabilities Communicates with SNMP controller through a shelf resident SpectraComm Manager SCM card for comprehensive non intrusive network management Provides terminal interface functions that are accessible when installed in SpectraComm shelf through the shelf resident SCM card using either a VT100 compatible ASCII terminal or a computer running the Telnet...

Страница 15: ...data rate of 56 or 64 Kbps depending on the form of line coding being used The DSU can be configured to start a group of DS0s on any DS0 in the T1 line The full T1 bandwidth is available when consecutive DS0s are used but restrictions on ones density may limit the actual usable bandwidth Use of consecutive DS0s for N x 64 kbps requires either B8ZS coding on the network line or provisioning in the ...

Страница 16: ...e ESF Facilities Data Link FDL The DSUs must be installed in a ring arrangement as shown in the figure The illustration shows a ring of 4 DSUs that supports 2 fractional T1 links designated primary and backup The selection of which T1 is to be primary and which is to be secondary is arbitrary The selection does affect how the DSUs are configured The Channel Redundancy configuration option controls...

Страница 17: ...ctional T1 data links FT1A Site 1 to Site 2 and FT1B Site 3 to Site 4 Normal operation T1A carries all channel data and the FDL management channel between 1 and 2 3 is cascaded to 1 4 is cascaded to 2 T1B carries no channel data it does carry the FDL management channel between 3 and 4 T1A Loss DSUs reconfigure automatically to route all channel data over T1B 1 cascades to 3 2 cascades to 4 FDL man...

Страница 18: ... systems include one base shelf one power supply and one power supply blank front panel Zone 1 connector panels as stated one 16 slot DB25 Zone 3 connector panel two standard mounting brackets 19 23 inch and assorted mounting hardware Enclosures SpectraComm 2000 enclosure single power supply 010B226 001 SpectraComm 2000 enclosure redundant power supply 010B226 002 MultiPak Enclosure ME 2 Model 1 0...

Страница 19: ...E 027H218 XXX Network Interface for use with SpectraComm 2000 enclosure shielded RJ45 to shielded RJ45 027H251 XXX Cascade Interface for use with SpectraComm 2000 enclosure shielded RJ 48C plug to shielded DB25 male Cascade Port to multiplexer DTE 027H245 XXX Terminal Port Adapter for use with SpectraComm 2000 enclosure RJ45 to DB25 male 8 pin RS561 to 15 pin RS232 029H210 001 Terminal Port Adapte...

Страница 20: ...System Description Fault Tolerant Switching Application 1 8 SpectraComm 553 Fractional T1 DSU 076R155 000 Installation and Operation Manual Issue 7 ...

Страница 21: ...s large amounts of heat e g power supplies Housings A rack mountable SpectraComm 5000 shelf can house up to 16 plug ins and be installed in 19 and 23 inch wide equipment racks A MultiPak enclosure can house up to 10 plug ins and a SpectraComm 2000 shelf can house 2 plug in pc cards In any of the three housings the SC 553 DSU can be installed in any card slot The SC 5000 shelf and the MultiPak encl...

Страница 22: ...VAC 4A 50 60Hz 220 240VAC 2A 50 60Hz J 50 J51 J49 CAUTION HIGH VOLTAGE DISCONNECT POWER BEFORE SERVICING THIS ENCLOSURE MAY CONTAIN FCC REGISTERED EQUIPMENT SPECIFIC REGISTRATION INFORMATION IS CONTAINED ON INDIVIDUAL UNITS S N MODEL MS 1 GeneralDataComm Inc Middlebury CT LISTED J1 J2 J3 J5 J6 J7 J8 J9 J10 J11 J12 J13 J14 J15 J16 J32 J48 J52 THIS EQUIPMENT COMPLIES WITH THE REQUIREMENTS FOR A CLAS...

Страница 23: ... CAUTION HIGH VOLTAGE DISCONNECT POWER BEFORE SERVICING THIS ENCLOSURE MAY CONTAIN FCC REGISTERED EQUIPMENT SPECIFIC REGISTRATION INFORMA TION IS CONTAINED ON INDIVIDUAL UNITS S N MODEL MS 1 General DataComm Inc Middlebury CT LISTED TB1 1 EXT RING EXT V BAT GND F GND RING GND BAT J17 UNIVERSAL BACKPLANE J20 J1 J2 J3 J5 J6 J7 J21 J18 J8 J9 J10 J11 J12 J19 J22 J52 J13 J14 J15 J16 Term 2 Term 1 Busin...

Страница 24: ...any slot of its housing To install the DSU 1 Insert the module into its slot in an SC 5000 shelf or MultiPak enclosure the GDC logo is on top in an SC 2000 shelf the GDC logo is to the right and slide it in until it makes contact 2 Pull down the ejector tab and firmly push the module in until it seats in the rear connectors Business Equipment Connections DTE The standard business equipment interfa...

Страница 25: ...am plug on the A and B pins of connector A2J1 The channel interface cannot function if those pins are left open Figure 2 5 SC 553 PC Card with Option Settings Note The SC 553 is not equipped to supply span power The span power option jumper X1 shown in Figure 2 5 functions to provide compatibility with spans that are are not powered from another source The typ ical position for X1 is OUT i e not l...

Страница 26: ...ce Signals Table B 3 On the 50 pin connector back panel J17 supports network interface connections for slots 1 6 J18 supports slots 7 13 and J19 supports slots 14 16 The Appendix B Interface Signals Table B 4 shows the connector and pins an SC 553 DSU employs when installed in each slot SC 553 Base Card No 076P016 001 EIA 530 Plug In Card No 048P042 001 J1 J2 J3 Bypass J5 J4 EIA 530 Plug In Card N...

Страница 27: ...ts slots 7 13 and J22 supports slots 14 16 Appendix B Interface Signals Table B 6 shows the conTable B 6 connector and pins an SC 553 DSU employs when installed in each slot Electrical Power Connection The DSU obtains power directly from its shelf or enclosure Consult shelf or enclosure documentation for power and grounding instructions External Alarm Indication SC 2000 shelf Only The SC 2000 shel...

Страница 28: ...c Communication Channel DCC to a remote SC 553 DSU The DCC enables you to perform terminal interface management of the remote DSU from the master DSU site An SC 553 DSU that is installed in the same shelf or enclosure as an SCM card is always a diagnostic master unit and one that is not installed together with an SCM card is always a remote unit A DCC can be established between a master unit and a...

Страница 29: ...ocal Test with Self Test by means of the front panel controls When you insert the SC 553 DSU into the shelf all the front panel LEDs should light for approximately one second If this does not occur there is a problem with the unit Install a spare unit if one is available If you require assistance contact VITAL Network Services at the toll free telephone number listed in the Preface of this manual ...

Страница 30: ...Installation and Setup Local Test Self Test 2 10 SpectraComm 553 Fractional T1 DSU 076R155 000 Installation and Operation Manual Issue 7 ...

Страница 31: ... beyond the scope of this manual Consult the manual for your SNMP controller for detailed instructions on the use of its functions As a supplement to those instructions this manual provides information specific to the SC 553 DSU in particular the MIB tables that are contained in Appendix C Alarm Definitions This chapter does provide instructions for using the terminal interface The terminal interf...

Страница 32: ...nterface does not alternate signal states to represent marks OOF Out Of Frame Lit when the DSU network interface is experiencing an out of frame condition TM Test Mode Lit when the DSU is performing any type of test Blinks to indicate detected errors during a Self Test ON Power On Lit while power is applied to the DSU RSP Response Lit while the DSU is transmitting a response to a network controlle...

Страница 33: ... switch a second time to end a test TM indicator blinks for QRS errors during self test RL Remote Digital Loop Momentary switch When pressed causes the DSU to send a PN127 loopback command to the remote unit LED is lit while this test is in progress The DSU can perform a remote digital loopback test with any compatible device that recognizes the command When pressed and held for 2 seconds activate...

Страница 34: ...ent that supplies signals to the network through the IN jack and receives the signals back through the OUT jack for error checking Connection of test equipment breaks the normal transmit and receive signal paths MON TX RX Network Transmit TX and Receive RX Signal Monitor Jacks Insert test cables to monitor the payload portion of TX DSU to network and RX network to DSU signals Monitoring does not b...

Страница 35: ...DSU A is the Master on the link In conjunction with the SCM it supports local SNMP and or terminal interface management It can initiate a DCC by performing remote wake up and support SNMP and or terminal interface management of the Remote over that channel DSU B is the Remote on the link it does not support local SNMP and or terminal interface at its own site SC 553 DSU in SC 5000 Shelf or MultiPa...

Страница 36: ...0 compatible terminal connected directly to the SCM front panel or a computer with a Telnet connection to the SCM LAN port VT100 compatible Terminal Connected to SC 2000 Enclosure When the SC 553 DSU is installed in an SC 2000 enclosure and the other slot is empty you must connect the terminal to the back panel TERM connector for the occupied slot When you turn on the terminal the first screen to ...

Страница 37: ...he SCM LAN port When you do so the Telnet Connection Login screen shown in Figure 3 5 is the first to appear Figure 3 5 Telnet Connection Login Screen After you enter the login password the screen displays the Shelf Inventory screen that appears in Figure 3 6 Note There is a 10 minute timeout on the terminal interface The DSU terminates the session if you allow 10 minutes to pass without pressing ...

Страница 38: ...alarm next to the name of any device that currently has an active alarm condition Type a slot number and press the Enter key If the slot number corresponds to a unit that has a dedicated remote the SCM displays a Drop Inventory screen from which you can select either the Master local or Remote DSU If the slot number corresponds to a unit without a dedicated remote the selected DSU displays its SC ...

Страница 39: ...helf Inventory screen Main Menu The SC 553 Console Port Main Menu screen shown in Figure 3 7 is the access point to the individual terminal interface functions Type the number that corresponds to the function you need to use and press the Enter key Figure 3 7 SC553 Main Menu Screen SLOT 6 DROP INVENTORY Drop Card 0 MASTER SC553 1 REMOTE SC553 S Go To Shelf Inventory Enter drop SC553 CONSOLE PORT S...

Страница 40: ...hlighting disappears and the field displays the new setting 5 Repeat steps 2 through 4 for each option you need to change 6 After you ve made all required changes type selection 0 Return to Previous Menu and press the Enter key The display returns to the Configuration Menu 7 To put the configuration changes you ve made into effect type S Save Update Configuration and press the Enter key You may th...

Страница 41: ...e ESF Default D4 Unframed 3 Network Line Code B8ZS Bipolar with 8 Zero Substitution encoding for the network side Default AMI Alternate Mark Inversion encoding for the network side 4 Network Interface Type DS 1 for connection to a T1 line Default DSX 1 for connection to the cascade port of another DSU or to a CSU 5 Network Line Buildout Control Manual Default Auto Caution Do not enable automatic L...

Страница 42: ...gnal provided by the DTE and uses that as its timing source 9 Network Fallback Clock Source Internal DSU provides the send timing source for T1 data output to the net work Default Receive DSU recovers receive T1 clock from the network receive T1 data and uses it as the send timing source for T1 data output to the network Cascade DSU recovers receive clock from T1 data it receives at the Cascade Po...

Страница 43: ...24 DS0s Default or 56kbps 1 DS0 through 1344 kbps 24 DS0s 3 Channel DS0 Format N x 64 kbps Default N x 56 kbps 4 Channel Allocation Consecutive selects consecutive DS0s for payload Default Alternate selects alternate DS0s for payload unused DS0s are forced to marks 5 Channel Inband DCC Mode None Default DCC DS0 DSU adds 1 DS0 to group required to support Channel Rate and uses it for diagnostic cha...

Страница 44: ... c Channel Constant DCD Disable DCD ON while DSU is in data mode not blocked by alarm condition or diagnostic mode Default Enable DCD forced ON d Channel Constant DSR Disable DSR ON while DSU is ready to accept data not blocked by diagnostic mode Default Enable DSR forced ON e Channel Constant CTS Disable CTS follows RTS Default Enable CTS forced ON f Channel EIA Test Leads Disable DTE Test Leads ...

Страница 45: ...ration menu screen 1 Cascade Service State Out of Service Default In Service 2 Cascade Frame Control Manual Default Auto DSU adapts to either ESF or D4 framing based on the signal it receives Caution Do not enable Auto Framing for both the cascade port and the unit connected to it 3 Cascade Frame Type ESF Default D4 Unframed 4 Cascade Line Code B8ZS Bipolar with 8 Zero Substitution encoding for th...

Страница 46: ...When you determine the unit requires replacement or other on site attention this feature enables you to identify it for easy location by on site personnel 5 Cascade Interface Type DS 1 for connection to a T1 line Default DSX 1 for connection to the cascade port of another DSU or to a CSU 6 Cascade Line Buildout Control Manual Default Auto Caution Do not enable automatic LBO for both the cascade po...

Страница 47: ...ion In the Alarm Mask Configuration screen you designate which alarms the unit reports Unmask and which alarms it does not report Mask Definitions of the alarm conditions appear in Appendix C Alarm Definitions In the Alarm Threshold Configuration screen you set conditions for the reporting of three network alarms Network BPV CRC and LAD alarms when they are to be reported are determined by means o...

Страница 48: ...7 3 Type the selection number or letter of the option you intend to change Highlighting appears on the current setting field for the corresponding option 4 Use the arrow keys to toggle the highlighted field through its two potential settings Mask and Unmask 5 When the field displays the desired setting press the Enter key The highlight returns to the Select field 6 Repeat steps 3 through 5 for eac...

Страница 49: ... into effect go to step 11 without selecting Save Update Unit 11 To dismiss the Alarm Configuration menu screen type selection 0 Return to Main Menu and press the Enter key Figure 3 14 Alarm Mask Configuration Screen NETWORK ALARM MASK CHANNEL ALARM MASK 1 Network OOF MASK a DCD Loss MASK 2 Network LOS MASK b DSR Loss MASK 3 Network AIS MASK c DTR Loss MASK 4 Network USS MASK d External Tx Clock L...

Страница 50: ...st begins the Diagnostics screen shown in Figure 3 16 is replaced by the Diagnostics Results screen shown in Figure 3 17 The Results screen permits you to monitor the progress of the test procedure while it takes place and displays results at the end of procedures that employ self test Instructions for using the screens to perform tests appear in Chapter 4 Tests together with descriptions of the d...

Страница 51: ...11 4 T1 Test Direction Network 5 Start T1 Test 6 Channel Test Type SelfTest 7 Channel Test Pattern 511 8 Start Channel Test 9 DS0 Test Type SelfTest a DS0 Test Pattern 511 b DS0 Number 01 c DS0 Test Direction Network d Start DS0 Test Current f Test Duration 30sec 0 RETURN TO PREVIOUS MENU Select SC553 DIAGNOSTICS RESULTS 1 STOP TEST 2 INJECT SINGLE BIT ERROR ST ONLY 3 RESET COUNTERS Current test T...

Страница 52: ...r Status from the Main Menu the resulting screen shown in Figure 3 18 presents a menu with those five categories and a selection for resetting the TR54016 statistics Figure 3 18 Monitor Status Menu Screen Alarm Status Screen The Alarm Status screen shown in Figure 3 19 presents current status information concerning alarm conditions It displays the current status INACTIVE or ACTIVE of the alarm con...

Страница 53: ...ed when the optional cascade port is not present When you are done viewing the screen type 0 and press the Enter key to return to the Monitor Status menu Note At low signal levels 15 dB and below the unit s sensitivity to pulse density number of marks in the data can cause overlapping in the range display NETWORK ALARM STATUS CHANNEL ALARM STATUS Network OOF INACTIVE DCD Loss INACTIVE Network LOS ...

Страница 54: ...edundancy Checksum CRC errors appears only in near end user display The Current Interval portion of the screen displays how many error events of each type have occurred during the current 15 minute interval The Total Statistics portion of the screen displays how many error events of each type have occurred since the last time the statistics were reset The menu at the bottom of the screen enables y...

Страница 55: ...ire screen the selection of their source requires a separate screen shown in Figure 3 19 The Interval Statistics Selection screen provides three choices 1 Near End User displays statistics on error events at the local DSU that are accumulated by the DSU itself 2 Near End Network displays statistics on error events at the local DSU that are accumulated by the Telco switching office 3 Far End Networ...

Страница 56: ...r condition Each hour is displayed in four columns representing 15 minute intervals The DSU tracks intervals and hours starting when the system is powered up so the display does not necessarily align with the quarter hour boundaries 5 00 5 15 5 30 etc If the Clear Statistics selection on the main Monitor Status screen was used within the past 24 hours the Interval Statistics screen shows only the ...

Страница 57: ...re being reported by the local SC 553 DSU They represent conditions that are occurring at Slips PLB or being detected by CRC Errors SEF FSBE LCV the local DSU The Inbound PRMs are conditions occurring or detected by the far end DSU which reports them to the local unit When you are done viewing the screen type 0 and press the Enter key to return to the Monitor Status menu SC553 TR54016 INTERVAL STA...

Страница 58: ...n restores all configuration option in the DSU their factory default settings and performs a reset 3 Soft Reset commands the DSU to perform a reset without altering its configuration 4 Firmware Download provides access to the Firmware Download Screen which is described below under its own heading When you are done viewing the Maintenance screen type 0 and press the Enter key to return to the Main ...

Страница 59: ...n Initial release is followed by A B etc Unit Serial Number 16 digit unit identifier Slot Number Can be 1 16 single SC 5000 shelf 1 32 linked pair of SC 5000 shelves 1 10 MultiPak enclosure 1 2 SC 2000 enclosure Drop Number 00 local unit 01 unit being communicated with by means of DCC Channel Interface V 35 Interface EIA 530 Interface Cascade Card Installed Not Installed MAINTENANCE SCREEN 1 WHAT ...

Страница 60: ...u to upload new operating firm ware into the DSU Uploading of firmware is typically required when GDC makes changes to im prove performance or to include new features The SC 553 DSU can store two versions of operating firmware designated as the Active Revision and the Standby Revision You can have newly downloaded firmware immediately serve as the Active Revision or you can store it as the Standby...

Страница 61: ...valid Download Aborted download aborted in progress by SCM Invalid Unzip Failed problem occurred during unzip of standby firmware Downloading transfer currently taking place Calculating Checksum approximately 40 seconds following completion of transfer Download Mode displays the DSU s selected response to a download of new firmware see the command selections below for the potential modes The five ...

Страница 62: ...DSU s response to the downloading of firmware Trivial File Transfer Protocol TFTP is used to perform the actual firmware download using the following procedure 1 Open a second window in which to perform the TFTP functions Keep the Firmware Down load screen on display in order to monitor the Download Status 2 Initiate a TFTP session to the SCM 3 At the TFTP prompt type bin and press the Enter key s...

Страница 63: ...y the same shelf as the SCM To download a remote unit you must use the Single Unit download and specify the appropri ate Slot Line Drop address Firmware Filename Format Address and Product Code Format Single Unit 3 digit product code 5 character product code 083 for SC553 00 83 for SC 553 2 digit code correction level 2 digit Drop 2 digit minor revision level 2 digit Line 2 digit major revision le...

Страница 64: ...Operation Terminal Interface 3 34 SpectraComm 553 Fractional T1 DSU 076R155 000 Installation and Operation Manual Issue 7 ...

Страница 65: ... interface front panel and DTE interface tests The tests that you can perform with the terminal interface are also available when you use an SNMP controller Those two means of control permit you to perform the tests that you can command with front panel switches and with the EIA control leads and a large number of others as well For information on testing the DSU from an SNMP controller consult do...

Страница 66: ...rface Main Menu The DSU responds by displaying the SC553 Diagnostics Selection screen as shown in Figure 4 1 3 Select the test type you intend to perform type 1 for a T1 Test 6 for a Channel Test or 9 for a DS0 Test and press the Enter key Highlighting appears on the Test Type selection field you have selected 4 Use the arrow keys to toggle the field through the available selections until it displ...

Страница 67: ...Test can isolate the DSU from Receive Timing its normal source of timing To provide timing to run the test type e and press the Enter key Highlighting appears on the Timing selection field Use the arrow keys to toggle the field so that it displays Internal and press the Enter key This instructs the DSU to use timing from its internal clock while the test is running 11 To start the selected test ty...

Страница 68: ... inject multiple errors 3 Reset Counters resets the error count 0 Return to Diagnostics Menul Programming a Pattern for T1 Tests 1 To create a 16 bit programmable test pattern type 3 and press the Enter key Highlighting appears on the T1 16 bit Progm Pattern field and the prompt ENTER 16 BIT PROGRAM PATTERN appears at the bottom of the screen 2 Type the 16 bit binary pattern of ones and zeros that...

Страница 69: ...he remote site either to establish a loopback or to activate a test pattern generator and checker using the same pattern for an end to end test The illustrations show Self Test in use as an End to End Test When coordinating this test with a remote site make sure that the same test pattern is selected in both units Figure 4 3 T1 End to End Self Test Network Interface Figure 4 4 T1 End to End Self T...

Страница 70: ...rom the terminal interface or by SNMP control Figure 4 5 T1 Payload and Line Loops T1 Network Interface Loop A T1 NI Network Interface Loop causes the DSU to send a loopback command to the Smart Jack or equivalent network terminating device that connects it to the T1 network The jack responds by looping the T1 signal back to the DSU This test can be initiated from the terminal interface or by SNMP...

Страница 71: ...rator to provide the signal for the Remote Loop and enables its Test Pattern Checker to verify the signal The DSU is isolated from its DTE while the Test Pattern Generator and Checker are enabled The Remote Test with Self Test function can be commanded by means of the terminal interface or by SNMP control Figure 4 7 T1 Remote Test with Self Test Network Interface Figure 4 8 T1 Remote Test with Sel...

Страница 72: ...digital loopback and loops the receive signal back to its transmit path The DTE interface of the local DSU remains active A test signal has to be generated and checked externally either by a DTE or by a bit error rate tester BERT Where the test signal originates depends on which T1 interface is being tested Connection at the local site can be made through the DTE interface or the front panel Line ...

Страница 73: ...onal T1 DSU 4 9 Issue 7 Installation and Operation Manual Figure 4 10 T1 Remote Test Cascade Interface TX Driver Analog Receiver Framer DTE Interface Framer TX Driver Analog Receiver SC 553 DSU Network Interface Cascade Interface Remote Device Network ...

Страница 74: ... without errors and blinks when an error is detected The Local Test with Self Test function can be commanded by means of the terminal interface by SNMP control or by means of front panel switches Self Test commanded by front panel switch es always uses a QRS pattern Figure 4 11 T1 Local Test with Self Test Network Interface Note Tests cannot be performed by means of front panel switches when the f...

Страница 75: ...t error rate tester BERT connected either to the DTE interface or the front panel Line jacks can supply and check a test signal The device supplying the test signal is responsible for error detection and reporting The Local Test function can be commanded by means of the terminal interface by SNMP control or by means of front panel switches Note Tests cannot be performed by means of front panel swi...

Страница 76: ...1 RL TX RX M O N 3 Enter test data at the DTE Compare data entered at the DTE with data looped back and displayed by the DTE Test equipment connected to the Line jacks can be used in place of the DTE 2 TM indicator On while Local Test loopback is active 1 To start test from front panel press T1 momentary action switch T1 indicator is lit during the test Press switch again to end the test TX Driver...

Страница 77: ...th Self Test Channel Remote Digital Loop RDL with Self Test commands the DSU to transmit an in band PN127 code that puts the remote DSU in Digital Loopback The local DSU then turns on its chan nel level test pattern generator and checker and transmits its test pattern to the remote DSU which loops it back The local DSU checks for errors in the test pattern it receives back Evaluates local and remo...

Страница 78: ... O N SC 553 DSU Remote DSU TPG TPC Framer TX Driver Analog Receiver Network Analog Receiver TX Driver Framer TPG Test Pattern Generator TPC Test Pattern Checker DTE Inter face DTE Inter face 2 TM indicator On during test Blinks to indicate a detected error Lit steadily while pattern is received correctly 1 To start the test from the front panel press RL and hold for 2 seconds RL indicator is lit d...

Страница 79: ...nected to the DTE interface can supply and check a test signal The device that supplies the test signal is responsible for error detection and reporting Remote Digital Loop can be commanded by means of the terminal interface by SNMP control by means of front panel switches or by the RL lead Pin 21 of the DTE interface Note Tests cannot be performed by means of front panel switches when the front p...

Страница 80: ...SNMP controller or by the terminal interface The default condition is disabled 553 OOF NS INS ON L I N E I N O U T RSP SD RD EQ BPV AIS TM ALM CH T1 RL TX RX M O N SC 553 DSU Remote DSU DTE Inter face Framer TX Driver Analog Receiver Network Analog Receiver TX Driver Framer DTE Inter face DTE or Test Device 3 Enter test data at the DTE Compare data entered at the DTE with data looped back and disp...

Страница 81: ...lf Test Channel Local Loop LL with Self Test commands the DSU to turn on its channel level test pat tern generator and checker and to loop data back at the channel interface Local Loopback with Self Test checks the channel interface circuitry isolated from both the DTE and the rest of the DSU During this test the DSU clamps the channel data it transmits to the T1 link to marks Local Loop with Self...

Страница 82: ... when the front panel has been inhibited by an SNMP controller or by the terminal interface Front panel enabled is the default condition The DTE interface LL lead can only command Local Loop if Channel EIA Test Leads has been enabled by an SNMP controller or by the terminal interface The default condition is disabled SC 553 DSU DTE Inter face Framer TX Driver Analog Receiver 553 OOF NS INS ON L I ...

Страница 83: ...ssage from the local unit to the remote unit and back to the local The de lay includes variables like circuit distance transmission path etc Hence no figures of acceptable delay are presented here The result is an indication of network response time and throughput that can be compared to results of the same test repeated under similar conditions at other times The DS0 Circuit Delay test can be com...

Страница 84: ...ng A DS0 Loopback can be initiated from the terminal interface or by SNMP control Figure 4 23 DS0 Loopback SC 553 DSU Remote DSU DTE Inter face TPG TPC Framer TX Driver Analog Receiver Network Analog Receiver TX Driver Framer DTE Inter face TPG Test Pattern Generator TPC Test Pattern Checker Local DSU transmits and monitors test pattern on the selected DS0 and measures time required for the round ...

Страница 85: ...ng Altitude Operating Non operating 32 to 122 F 0 to 50 C Derate by 1 C 1000 ft above sea level 40 to 185 F 40 to 85 C 5 to 95 without condensation 0 ft to 10 000 ft 0 m to 3 047 m 0 ft to 40 000 ft 0 m to 12 191 m Electrical Power dissipation Fusing Data rates Communication line Line impedance Network and Cascade port physical interface 6 W maximum Two 2 5 A 125 V GDC Part No 215 201 009 One 5 A ...

Страница 86: ...um 324 nsec 45 nsec 20 nsec maximum 648 nsec 15 nsec measured at half amplitude point of leading edges 100 nsec 10 to 30 of pulse amplitude 0 7 5 or 15 dB selectable or automatic at 772 kHz Internal clock external clock slave received timing loopback Network and Cascade receiver Operating range Input impedance Jitter tolerance Longitudinal balance Transmitter Pre equalization Impedance Receiver Im...

Страница 87: ...mum 1 one per 8 bits or 24 ones per 192 bits Type 1 consecutive framed ones filling the unused bandwidth D4 Superframe Format AT T 54016 Extended Super frame Format ESF and ANSI T1 403 ESF with automatic format option Out of Frame OOF Alarm Indication Signal AIS or Blue alarm Loss of Signal LOS Red alarm and Yellow alarm DS1 Line Loop with Self Test DS1 Local Test with Self Test DS1 Network Interf...

Страница 88: ...Technical Characteristics A 4 SpectraComm 553 Fractional T1 DSU 076R155 000 Installation and Operation Manual Issue 7 ...

Страница 89: ...a Set is receiving data not idle or OOS codes 25 NN 142 TM Indicates to DTE that Data Set is in a test mode 2 3 P S 103 103 BA A BA B Transfers data signals from DTE for transmission over communication line 3 14 R T 104 104 BB A BB B Transfers data signals received over communication line by Data Set to DTE 24 11 U W 113 113 DA A DA B Transfers transmitter signal timing information from DTE to Dat...

Страница 90: ...perational 20 23 CD A CD B Indicates to Data Set that DTE is prepared for data communications 7 AB Establishes common ground reference for all interface circuits except protective ground 8 10 CF A CF B Indicates to DTE that Data Set is receiving data not idle or OOS codes 15 12 DB A DB B Transfers transmitter signal timing information from Data Set to DTE 17 9 DD A DD B Transfers receiver signal t...

Страница 91: ...30 Transmit Data Ring 19 23 3 7 Transmit Data Tip 44 48 28 32 Signal Slot 9 J18 Slot 10 J18 Slot 11 J18 Slot 12 J18 Receive Data Ring 9 13 17 21 Receive Data Tip 34 38 42 46 Transmit Data Ring 11 15 19 23 Transmit Data Tip 36 40 44 48 Signal Slot 13 J19 Slot 14 J19 Slot 15 J19 Slot 16 J19 Receive Data Ring 1 5 9 13 Receive Data Tip 26 30 34 38 Transmit Data Ring 3 7 11 15 Transmit Data Tip 28 32 3...

Страница 92: ...lot 7 J21 Slot 8 J21 Cascade Send Data Ring 17 21 1 5 Cascade Send Data Tip 42 46 26 30 Station Clock A 18 22 2 6 Cascade Receive Data Ring 19 23 3 7 Cascade Receive Data Tip 44 48 28 32 Station Clock B 43 47 27 31 Signal Slot 9 J21 Slot 10 J21 Slot 11 J21 Slot 12 J21 Cascade Send Data Ring 9 13 17 21 Cascade Send Data Tip 34 38 42 46 Station Clock A 10 14 18 22 Cascade Receive Data Ring 11 15 19 ...

Страница 93: ... Bipolar Violations Cascade CRC Cascade Cyclic Redundancy Checksum Cascade RYEL Cascade Received Yellow Alarm DCD Loss Channel Data Carrier Detect Loss DSR Loss Channel Data Set Ready Loss DTR Loss Channel Data Terminal Ready Loss External Tx Clock Loss Channel External Transmit Timing Loss RxD No Transitions Channel Receive Data No Transitions TxD No Transitions Channel Transmit Data No Transitio...

Страница 94: ...able Signal State USS alarm event occurs when 10 consecutive severely errored sec onds occur in the signal being received It ends when the DSU has processed 10 consecutive sec onds of data without the occurrence of a severely errored second The count for this alarm increments by one each time the alarm state occurs regardless of how long it persists Network USS reflects conditions at the network i...

Страница 95: ...Data Carrier Detect DCD Loss alarm event occurs when the DSU cannot recover data from the incoming signal at the network interface DSR Loss A Data Set Ready DSR Loss alarm event occurs when the DSU is not outputting Data Set Ready to the DTE DTR Loss A Data Terminal Ready DTR Loss alarm event occurs when the DSU is not receiving the DTR signal from its DTE External Transmit Timing Loss An External...

Страница 96: ...Change alarm event occurs each time there is a change to the DSU configuration Top Supply Fail A Top Power Supply Failure Top Supply Fail alarm event occurs when the DSU is installed in a SpectraComm 2000 enclosure and the power supply installed in the upper position fails Bottom Supply Fail A Bottom Power Supply Failure Bottom Supply Fail alarm event occurs when the DSU is in stalled in a Spectra...

Страница 97: ...ers the imbedded clock from the data stream and uses it to synchronize its own internal timing reference to the master clock That allows it to extract the data reliably and to distribute timing to other devices connected to it On the network and cascade ports timing is imbedded in the data stream but it is provided on separate channel interface leads for the channels The default timing option for ...

Страница 98: ...t clock signals are still derived from the recovered clock With DTE Timing the customer equipment on the selected channel provides its own transmit clock signal from which the CSU DSU derives a master clock Cascade Timing extends the network receive T1 data stream to the cascade port and uses timing imbedded in the network and cascade receive data On the network and cascade ports the data rate is ...

Страница 99: ...DSU also translates 4 the receive T1 clock to provide the channel transmit and receive clock signals on the appropriate interface leads for each channel Select Slave Timing when using the SC 553 CSU DSU in a network or with a device at the remote end that supplies the clock as in a DACS Digital Access and Cross Connect System network Figure D 1 Slave Timing Note Select the appropriate timing optio...

Страница 100: ...ock T1 data into the receive buffer 3 The CSU DSU also translates 4 the receive T1 clock to provide the channel transmit and receive clock signals on the appropriate interface leads for each channel Select Internal Timing when using the SC 553 CSU DSU in a private network that does not provide timing e g a non DACS based service Figure D 2 Internal Timing Note A Configure only one CSU DSU in your ...

Страница 101: ... T1 clock from the network receive T1 data and uses it to clock T1 data into the receive buffer 6 The CSU DSU also translates 7 the receive T1 clock to provide the receive clock signals for the channel on the appropriate interface leads Select Channel Timing when using the SC 553 CSU DSU in a private network with the customer equipment on the channel supplying the clock Figure D 3 Channel Timing N...

Страница 102: ...ock signals on the appropriate interface leads for the channel The SC 553 CSU DSU extends the network receive T1 data stream to the remote equipment connected to the cascade port which uses it as a timing reference 5 and loops it back to the local CSU DSU 6 The local CSU DSU recovers the receive T1 clock from the cascade receive DSX 1 Digital Service Cross connect Level 1 data and uses it to multi...

Страница 103: ... Timing with a Network Timing Source Receive Buffer Transmit Send Buffer SC553 CSU DSU Network Receive T1 Data Clock Translator CH Receive Data CH Rcv Clk Network Send T1 Data Recovered Receive T1 Clock CH Send Data CH Tx Clk S1 Timing Source 1 2 3 4 Tx Mux To Network Cascade Receive DSX 1 Data 7 5 6 To Remote Cascade Equipment Cascade Send DSX 1 Data ...

Страница 104: ...cade Timing with a Cascade Timing Source Receive Buffer Transmit Send Buffer SC553 CSU DSU Network Receive T1 Data Clock Translator CH Receive Data CH Rcv Clk Network Send T1 Data Recovered Receive T1 Clock CH Send Data CH Tx Clk S1 Timing Source 1 2 Tx Mux To Network Cascade Receive DSX 1 Data To Remote Cascade Equipment Cascade Send DSX 1 Data 3 ...

Страница 105: ...k signal is input to the SC553 at the lower RJ48 jack located at the rear of the SpectraComm UAS shelf on Zone1 Refer to Chapter 2 Installation and Setup The timing signals are transferred through that jack using a standard EIA RS 422 interface See Figure D 6 Figure D 6 Station Timing SC553 CSU DSU Lower RJ48 jack at Zone 1 SpectraComm UAS Shelf Shelf Backplane Cascade Equipment Station Clock Inte...

Страница 106: ... end and select Slave Timing for the other as shown in Figure D 7A In this example the SC 553 CSU DSU at Site A is configured for Internal Timing making it the timing source If the customer equipment is to provide an external timing source select Channel Timing External DTE Timing for the CSU DSU connected to that equipment and select Slave Timing for the other as shown in Figure D 7B In this exam...

Страница 107: ...A SC 553 CSU DSU at Site A Supplies Timing SC 553 CSU DSU SC 553 CSU DSU Site A Channel Timing Option Channel Timing Timing Option Slave Timing B Customer Equipment at Site A Supplies Timing Site B Channel Site B Timing Source SC 553 CSU DSU SC 553 CSU DSU Site A Channel Timing Option Timing Option C Master Slave Multiplexer Timing Channel Site B Timing Source Mux Mux Master Slave Mux Loops Timing...

Страница 108: ...of cascade data between the PBX and the SC 553 CSU DSU the SC 553 CSU DSU will switch to Internal Timing Select Slave Timing for the SC 553 CSU DSU at Site B so that it will recover and loop timing if the slave PBX connected to it fails If both PBXs fail the CSU DSU at Site A will switch to Internal Timing and provide timing and the CSU DSU at Site B will switch to Slave Timing and recover and loo...

Страница 109: ...SU Addressing 2 7 E EIA Status and Receive Level Screen 3 23 EIA 530 Card Installation 2 5 Electrical Power Connection 2 7 Equipment List 1 6 External Alarm Indication 2 7 F Fault Tolerant Switching 1 5 Fault Tolerant Switching Application 1 4 Firmware Download 3 30 Fractional T1 Capabilities 1 3 Front Panel Configuration Screen 3 16 Front Panel Connectors 3 4 Front Panel Controls 3 3 Front Panel ...

Страница 110: ...n Clock Cascade Port Connection 2 7 T T1 Local Test 4 11 T1 Local Test with Self Test 4 10 T1 Network Interface Loop 4 6 T1 Payload and Line Loops 4 6 T1 Remote Test 4 8 T1 Remote Test with Self Test 4 7 T1 Self Test End to End 4 5 T1 Tests 4 5 Technical Characteristics A 1 Telnet Connection Login Screen 3 7 Telnet Connection via SCM Card 3 7 Terminal Interface 3 6 Terminal Interface Test Procedur...

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