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Table of Contents

 150-231-165-01, Revision 01

vi

September 22, 1998

 HLU-231 List 6E

System Settings ............................................................................................................................... 19

DS0 Blocking Option........................................................................................................ 20

DS1 Line Code Option...................................................................................................... 20

Margin Alarm Threshold .................................................................................................. 21

HAIS Selections ................................................................................................................ 21

HDSL Line Voltage Operation ......................................................................................... 21

Ground Fault Detect.......................................................................................................... 22

System Settings Screen Options ....................................................................................... 22

Loopback Menu............................................................................................................................... 24

Loopback Menu: No Doubler ........................................................................................... 25

Loopback Menu: Two Doublers ....................................................................................... 25

Initiating a Loopback ........................................................................................................ 26

Disable Loopbacks ............................................................................................................ 26

Performance Data Screens............................................................................................................... 27

Performance Data Screen: No Doubler............................................................................. 28

Performance Data Screen: With Doubler.......................................................................... 29

View Performance History .............................................................................................................. 29

The 7 Day History Screen: No Doubler............................................................................ 30

The 7 Day History Screen: With Doubler......................................................................... 30

View Alarm History ........................................................................................................................ 31

Alarm History Screen: No Doubler .................................................................................. 32

Alarm History Screen: With Doubler ............................................................................... 33

Circuit ID......................................................................................................................................... 33

System Alarms_______________________________________________________________________ 34

Retiring System Alarms .................................................................................................................. 34

Self Test........................................................................................................................................... 35

Loopback Operation __________________________________________________________________ 35

SmartJack (SMJK) Loopback.......................................................................................................... 35

Generic Loopback Code (GNLB) ................................................................................................... 35

Addressable Repeater Loopback Functions .................................................................................... 36

Initiating Manual Loopback Sessions ............................................................................................. 36

Loopback Test Procedures .............................................................................................................. 37

Loopback Operation without Doublers ........................................................................................... 38

Loopback Operation with Doublers ................................................................................................ 38

GNLB Loopback Test Procedures................................................................................................... 40

A1LB, A2LB, and A5LB Test Procedures ....................................................................... 40

A3LB and A4LB Test Procedures .................................................................................... 43

Summary of Contents for T1L2CSXAAA

Page 1: ...SERVICES TECHNICAL PRACTICE 150 231 165 01J SECTION 150 231 165 01 Model List Number Part Number CLEI Code HLU 231 6E 150 1111 65 T1L2CSXAAA R S 2 3 2 L MARGIN STATUS BRG SPAN XMT RCV BRG SPAN dB HLU...

Page 2: ...Information contained in this document is company private to PairGain Technologies Inc and shall not be modified used copied reproduced or disclosed in whole or in part without the written consent of...

Page 3: ...nsit immediately report the extent of damage to the transportation company and to PairGain Order replacement equipment if necessary Check the packing list to ensure complete and accurate shipment of e...

Page 4: ...Inspecting the Shipment 150 231 165 01 Revision 01 iv September 22 1998 HLU 231 List 6E...

Page 5: ...Provisioning the HLU 231 ______________________________________________________________ 8 Setting Options through SEL and MODE 8 Factory Default Values 8 Displaying System Inventory 9 Connecting to a...

Page 6: ...Day History Screen No Doubler 30 The 7 Day History Screen With Doubler 30 View Alarm History 31 Alarm History Screen No Doubler 32 Alarm History Screen With Doubler 33 Circuit ID 33 System Alarms_____...

Page 7: ...ption 49 Power Consumption Without Doublers 49 Maximum Power Dissipation 49 Maximum Power Consumption 49 Maximum Current Drain 49 Power Consumption With Doublers 50 Appendix D Compatibility __________...

Page 8: ...een 18 Figure 11 System Settings Screen 19 Figure 12 Loopback Menu No Doubler 25 Figure 13 Loopback Menu with Two Doublers 25 Figure 14 NLOC Loopback Mode in the Maintenance Terminal Main Menu 26 Figu...

Page 9: ...231 List 6E System Settings Screen Options 22 Table 10 Errored and Unavailable Seconds Definitions 27 Table 11 Alarm History Fields and Descriptions 32 Table 12 HDSL System Alarms 34 Table 13 SPLB Lo...

Page 10: ...List of Tables 150 231 165 01 Revision 01 x September 22 1998 HLU 231 List 6E...

Page 11: ...ightning and power cross protection on HDSL interfaces 784 kbps full duplex 2B1Q HDSL Transmission on two pairs Front panel status indicating LED Automatic front panel display blanking Margin threshol...

Page 12: ...out HiGain Doublers This section addresses HLU 231 List 6E operation when used without doublers For applications without doublers the HLU 231 is directly connected to the HRU by the two HDSL cable pai...

Page 13: ...featuring A status display System option buttons Status LED DSX 1 access jacks RS 232 Craft port CLEI ECI bar code number Configuration number Card edge connector Front Panel The HLU 231 List 6E front...

Page 14: ...HDSL span at the DSX 1 interface Breaks the XMT and RCV paths to permit test signal insertion and retrieval BRIDGE Provides non intrusive bridging jack access to XMT and from RCV the HDSL span at the...

Page 15: ...front panel SELF TEST The HLU is in a self test mode This occurs every power ON OFF cycle ALRM Alarm Condition Exists A minor alarm condition is in effect 1 xx or 2 yy HDSL Loop Margins Indicates the...

Page 16: ...hour ES threshold Causes a minor alarm DS0 DS0 Blocked Channels Indicates status of DS0 blocked channels NONE indicates no channels are blocked BLK indicates some channels are blocked MAL1 2 Margin Al...

Page 17: ...rms on page 34 for further information about system alarms INSTALLATION To install the HLU 231 1 Slide the HLU 231 into the card guides for the desired slot then push the unit back until it touches th...

Page 18: ...ayed mode to the selected setting and then advances to the next configurable parameter After the last parameter has been selected a Confirm Yes No message appears on the front panel display 4 Do one o...

Page 19: ...an access the maintenance provisioning and performance screens To connect to a maintenance terminal 1 Connect a standard 9 pin terminal cable to the RS 232 Craft port on the HLU 231 front panel 2 Conn...

Page 20: ...31 165 01 Revision 01 10 September 22 1998 HLU 231 List 6E Figure 4 DB 9 RS 232 I O Pinouts DB 9 Connector DCE RD Recieve Data TD Transmit Data 3 2 5 DB 9 Connector DTE DB 25 Connector DTE TERMINAL TE...

Page 21: ...up to two doublers with three HDSL spans The Span Status Performance Data and Performance History may display as many as three screens to depict an HLU 231 system Figure 5 System Spans Navigation Keys...

Page 22: ...or DS0 blocking INITIALIZING THE MAINTENANCE TERMINAL SCREENS Press the several times to initiate the autobaud connection and to initialize the Maintenance Terminal screens MAINTENANCE TERMINAL MAIN M...

Page 23: ...HDUs Figure 8 shows status between an HLU and its first doubler HDU1 If there is only one doubler the next screen Figure 9 shows status between HDU1 and the HRU If there are additional doublers the S...

Page 24: ...ES 00002 00004 00005 00007 seconds 24 HOUR UAS 00016 00013 00002 00001 second s DS1 STATUS HLU HRU 24 HOUR BPV Seconds 00000 00000 24 HOUR UAS Count 00000 00000 Frame type ESF ESF Code type B8ZS B8ZS...

Page 25: ...1 HDSL 2 cur min max cur min max cur min max cur min max MARGIN 21 21 21 21 21 21 21 21 21 21 21 21 dB PULSE ATTN 19 19 20 19 d B PPM OFFSET 00 00 17 17 ppm 24 HOUR ES 00000 00000 00000 00000 seconds...

Page 26: ...Q pulse from the distant end The value is related to the 196 kHz loss of the cable pair The pulse attenuation is a more direct indication of the loop attenuation to the 2B1Q signal than is the 196 kHz...

Page 27: ...tage SMJK Smart Jack Loopback Loopback at HRU 412 remote towards network initiated by 2 in 5 in band loopback code or out of band ESF data link code Figure 15 NREM Network Remote Loopback Loopback at...

Page 28: ...CI initiated by ILR code HLU 231 front panel MANUAL LOOPBACK push buttons or maintenance terminal Figure 15 ARM Armed The HiGain system has detected the IR loopback 2 in 5 arming code TLOS Transmit L...

Page 29: ...g of system setting options Press from the Maintenance Terminal Main Menu to open the System Settings screen Figure 11 Figure 11 System Settings Screen When editing entries in the Clock screen and whe...

Page 30: ...0 channels with an all ones idle code The result of blocking the idle code is that the CRC checksum delivered to the remote end when the payload is in the BSF format will not match the checksum calcul...

Page 31: ...t turn up when one conductor does open a system alarm occurs and causes the AIS LOS condition This alerts the maintenance personnel of the problem 2LP requires both HDSL loops to be out of sync LOSW b...

Page 32: ...he Equalizer to DSX 1 for 133 to 266 feet 266 Sets the Equalizer to DSX 1 for 266 to 399 feet 399 Sets the Equalizer to DSX 1 for 399 to 533 feet 533 Sets the Equalizer to DSX 1 for 533 to 655 feet Sm...

Page 33: ...rs its B8ZS mode It reverts back to its Alternate Mark Inversion AMI output mode if no B8ZS patterns are received at the HRU input for five seconds The HLUs T1 input can detect either AMI or B8ZS when...

Page 34: ...smit the signal from the network towards the CI RCU port or to open and terminate its RCV CI port when an HRU NREM or SmartJack loopback is executed The AIS signal is not sent towards the CI Margin Al...

Page 35: ...enu with Two Doublers LOOPBACK MENU TIME 00 15 34 DATE 02 02 98 CIRCUIT ID A DISABLE LOOPBACKS B NETWORK LOOP HLU NLOC C NETWORK LOOP HRU NREM G CUSTOMER LOOP HLU CREM H CUSTOMER LOOP HRU CLOC E xit L...

Page 36: ...OC Loopback Mode in the Maintenance Terminal Main Menu Disable Loopbacks The Disable Loopbacks option allows you to disable cancel any of the loopbacks listed in the screen To disable loopbacks press...

Page 37: ...erformance Data screen you can do the following Press to view the previous 4 hour data screen Press to view the next 4 hour data screen Press to exit Press to view the next available span Since the HL...

Page 38: ...ILABLE SECONDS DS1 HDSL 1 HDSL 2 HLU HRU HLU HRU HLU HRU 20 30 000 000 000 000 000 000 000 000 000 000 000 000 20 45 000 000 000 000 000 000 000 000 000 000 000 000 21 00 000 000 000 000 000 000 000 0...

Page 39: ...by pressing Clear Since the HLU 231 is considered the master module this clears all performance data screens at both the HLU 231 and the HRU The RS 232 terminal interface at the HRU does not allow th...

Page 40: ...m the 7 Day History screen to advance through the history screens for the various spans Figure 18 is an example of a 7 Day History screen that lists history data for the third span Doubler 2 to the HR...

Page 41: ...l data from the screen Press to exit from the Alarm History screen Time 03 09 34 7 DAY HISTORY CIRCUIT ID SPAN 3 ERRORED SECONDS UNAVAILABLE SECONDS DS1 HDSL 1 HDSL 2 HLU HRU HDU4 HRU HDU4 HRU 04 09 0...

Page 42: ...L2 First and last instance of LOSW on HDSL2 Current condition number of alarms Span 1 ES HDSL1 First and last instance of ES on HDSL1 Current condition number of alarms Span 1 ES HDSL2 First and last...

Page 43: ...creen that lists history for the third span Doubler 2 to the HRU Figure 20 Alarm History Screen for Span 3 CIRCUIT ID To set a Circuit ID 1 Press from the Maintenance Terminal Main Menu 2 Type a uniqu...

Page 44: ...nhibited ALRM LLOS Local Loss of Signal Loss of the DSX 1 input signal Cannot be inhibited ALRM RLOS Remote Loss of Signal Loss of the HRU DS1 input signal Disable the RDA Remote DS1 Alarm option This...

Page 45: ...ACK CODE GNLB The HiGain generic loopback code is GNLB The GNLB allows in band codes to loop up either the HLU NLOC 4 in 7 or HRU NREM 3 in 7 towards the network In addition it allows in band codes to...

Page 46: ...the arming code from exiting the Line Unit it does not need this FAR END ACTIVATE code A3LB differs from A4LB in that A3LB supports the additional 1 in 6 SMJK loopback command A HiGain system may tak...

Page 47: ...back is active the method by which it was activated is indicated in the Loopback and Status screens by inserting either HG HiGain or PL Payload adjacent to the identified loopback for example NREM HG...

Page 48: ...ns or from a family of Special Loopback SPLP in band loopback commands Figure 21 HLU 231 Non Doubler Loopback Configurations LOOPBACK OPERATION WITH DOUBLERS The complete family of loopbacks that a Hi...

Page 49: ...1 0 0 4 in 6 CDU2 1 1 1 1 1 0 5 in 6 DSX 1 CI DS 1 Loopbacks toward customer Loopbacks toward network HDSLSPAN HLU NLOC AIS AIS AIS AIS AIS AIS AIS AIS SMJK TLOS NREM CLOC HRU HRU HRU HRU HRU HDSLSPA...

Page 50: ...y issuing the 6 in 7 command at the HRU DS1 input port The HRU can be looped up from the remote location CLOC by issuing the 5 in 7 command at the HRU DS1 input port Notes on Doubler GNLB Loopback Tes...

Page 51: ...determine the duration of this loopback unless it is overridden by the Time out Override command or a loop down command is sent If the Time out Override code 1101 0101 1101 0110 D5D6 is received the...

Page 52: ...e 14 on page 43 a network tester can activate loopbacks NLOC or NREM or SMJK if enabled A customer tester can activate loopbacks CLOC or CREM All loopbacks shown in Table 14 can also be initiated from...

Page 53: ...10 2 0100 4 IOR LPBK NLOC and CREM 229 231 bit errors c c The HRU identifies CREM with 231 bit errors including the frame bits When framed data is being sent in the AUTO framing mode the number of the...

Page 54: ...Table 15 Addressable 3 and 4 A3LB and A4LB Repeater Loopback Commands Position Name Codea a The left most bit arrives first in all sequences The detection algorithm functions reliably with a random 10...

Page 55: ...e DSX 1 Input Level 1 5 to 7 5 dBDSX DS1 Line Rate 1 544 Mbps 200 bps DS1 Line Format AMI B8ZS or ZBTSI DS1 Frame Format ESF SF or UNFR Maximum Heat Dissipation 8W without doubler 12 5W with doubler t...

Page 56: ...CRC Cyclic Redundancy Check CREM Customer Remote Loopback CSA Carrier Service Area CSU Channel Service Unit DCE Data Circuit Terminating Equipment DDS Digital Data Service DL Data Link DS1 Digital Si...

Page 57: ...ce Unit NLOC Network Local Loopback NMA Network Management and Administration NREM Network Remote Loopback POTS Plain Old Telephone Service SAIS SmartJack AIS SF Super Frame SNR Signal to Noise Ratio...

Page 58: ...HLU 231 receives a 1 544 Mbps DSX 1 data stream from the DSX 1 digital cross connect interface The HLU 231 contains a DS1 frame synchronizer controlled by an 8 bit microprocessor that determines the t...

Page 59: ...ximum bay dissipation is limited to 946 Watts At 8 Watts per slot this limits the number of occupied slots to 118 per bay The thermal loading limitations imposed when using the HLU 231 in a Controlled...

Page 60: ...he rated capacity of the shelf Use Table 17 to select the appropriate load fuses for the Building Distribution Fuse Bus BDFB when deploying the HiGain system equipment in COs The maximum HLU 231 List...

Page 61: ...nes the battery capacity required to maintain an 8 hour stand by battery reserve for emergency situations It thus limits the maximum number of plugs per remote enclosure Use this data to perform this...

Page 62: ...of the same vintage in order to realize these enhancements Enhanced doubler applications preclude the mixing of newer doubler models with older models of the HRU and HLU Table 18 on page 53 provides a...

Page 63: ...FF CPEI ON CPEI OFF HLU 231 List 6X HLU 232 List 1D 1 1 2 2 1 1 2 2 1 2 2 2 HLU 319 List 2X HLU 388 List 2X 1 1 2 2 1 1 2 2 1 2 2 2 HLU 231 List 7X HLU 431 List 1D 1 1 2 2 1 2b 2 2 1 2 2 2 HLU 231 Lis...

Page 64: ...730 2800 Transmission speeds up to 28 8 kbps are supported with a character format of 8 N 1 WARRANTY PairGain Technologies warrants this product to be free of defects and to be fully functional for a...

Page 65: ...the appropriate instruction manual for the unit you are installing to get information on Cabling Correct connections Grounding MODIFICATIONS The FCC requires the user to be notified that any changes o...

Page 66: ...CI bar code label Contains the serial number and part number of the unit as indicated in both bar code and text format Also contains the configuration number of the unit as indicated by CFG nn where n...

Page 67: ......

Page 68: ...Corporate Office 14402 Franklin Avenue Tustin CA 92780 Tel 714 832 9922 Fax 714 832 9924 For Technical Assistance 800 638 0031...

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