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Troubleshooting

 150-319-151-01, Revision 01

44

September 17, 1999

 HLU-319 List 5A

Table 13.

Summary of HiGain Loopback Codes

Method of Transmission

Loopback

Code

Description

Test Set

Craft Port

MODE/SEL

NLOC

1111000

4-in-7

DSX-1 signal is looped back to the network at the HLU.

X

X

X

NDU1

110000

2-in-6

DSX-1 signal is looped back to the network at the HDU1.

X

X

X

NDU2

111000

3-in-6

DSX-1 signal is looped back to the network at the HDU2.

X

X

X

NDU3

1010001

DSX-1 signal is looped back to the network at the HDU3.

X

X

X

NDU4

1010010

DSX-1 signal is looped back to the network at the HDU4.

X

X

X

NREM

1110000

3-in-7

DSX-1 signal is looped back to the network at the HRU.

X

X

X

CLOC

1111100

5-in-7

Signal from customer is looped back to the customer at the 
HRU.

X

X

X

CDU1

111100

4-in-6

Signal from customer is looped back to the customer at the 
HDU1.

X

X

X

CDU2

111110

5-in-6

Signal from customer is looped back to the customer at the 
HDU2.

X

X

X

CDU3

1011001

Signal from customer is looped back to the customer at the 
HDU3.

X

X

X

CDU4

1011010

Signal from customer is looped back to the customer at the 
HDU4.

X

X

X

CREM

1111110

6-in-7

Signal from customer is looped back to the customer at the 
HLU.

X

X

X

SMJK LpUp

(PL)

11000

2-in-5

SmartJack Loopup or NID (PL) code. Invokes HRU 
loopback towards network.

X

SMJK LpUp

(ESF-DL)

1111-1111-
0100-1000

SmartJack Loopup or NID (ESF-DL) code. Invokes HRU 
loopback towards network.

X

SMJK LpDn

(PL)

11100

3-in-5

SmartJack Loopdown or NID payload (PL) code. Removes 
SMJK, NLOC, NREM, CREM, CLOC, CDU

n

, and NDU

n

.

X

SMJK LpDn

(ESF-DL)

1111-1111-
0010-0100

SmartJack Loopdown or NID (ESF-DL) code. Removes 
SMJK, NLOC, NREM, CREM, CLOC, CDU

n

, and NDU

n

.

X

HiGain systems feature the SmartJack option, which can emulate a Network Interface Device 
(NID) for the purpose of loopback testing of the HiGain circuit. SMJK and NREM loopbacks 
perform the same functions but their initiation differs. SMJK indicates that the loopback was 
initiated by the 2-in-5 inband command. NREM, on the other hand, is initiated by the 3-in-7 
inband command or by a command issued from the maintenance terminal or the MODE and SEL 
buttons. 

Use the inband commands to enable or disable the SMJK loopback options. (Pressing the 
remote loopback button will also loopdown the SmartJack loopback.) The HLU system setting 
is normally enabled to recognize all inband SmartJack loopback commands.

Содержание 150-1140-51

Страница 1: ...HIGAIN LINE UNIT PAIRGAIN TECHNOLOGIES INC ENGINEERING SERVICES TECHNICAL PRACTICE SECTION 150 319 151 01 Model List Number Part Number CLEI Code HLU 319 5A 150 1140 51 T1L2N20A...

Страница 2: ...es Inc and shall not be modified used copied reproduced or disclosed in whole or in part without the written consent of PairGain Information furnished by PairGain Technologies is believed to be accura...

Страница 3: ...subject area of the email message INSPECTING SHIPMENT Upon receipt of the equipment Unpack each container and visually inspect the contents for signs of damage If the equipment has been damaged in tr...

Страница 4: ...Device 9 Verification with a Downstream Device 9 Provisioning Requirements 10 Provisioning_________________________________________________________________________ 11 Using the MODE and SEL Buttons 1...

Страница 5: ...LB Test Procedures 52 Appendix A Specifications____________________________________________________________ 53 HDSL Insertion Loss Guidelines 54 Power Consumption 54 Power Consumption without Doublers...

Страница 6: ...Support _________________________________________________________ 65 Technical Support 65 World Wide Web 65 Returns 65 Appendix E Glossary ____________________________________________________________...

Страница 7: ...4 31 Day Performance History Screen No Doubler 31 15 31 Day Performance History Screen Four Doublers Span 5 32 16 Alarm History Screen No Doubler 34 17 Alarm History Screen Four Doublers Span 5 34 18...

Страница 8: ...er Loopback Commands A1LB A2LB A5LB 49 15 Addressable Repeater Loopback Commands A3LB and A4LB 52 16 HDSL Loss Over Cables 54 17 HLU 319 Power Parameters No Doubler 54 18 HLU 319 Power Parameters Sing...

Страница 9: ...FEATURES Product Enhancements Five span range with four doublers 60 kft 24 AWG Four line powered spans three doublers and one remote Reduced power consumption Ultra low wander Stratum 1 compliant Low...

Страница 10: ...features of newer HiGain doublers refer to HiGain Doubler Circuit Deployment on page 63 APPLICATIONS HiGain systems provide a cost effective easy to deploy method for delivering T1 High Capacity Digi...

Страница 11: ...an onboard 130 Vdc 8 5 W power supply that can power the 200 mW PCS remote radio ports The line unit recognizes the HRU 411 if the CPE POWER switch is set to ON and performs the following two function...

Страница 12: ...5A FRONT PANEL The HLU 319 List 5A front panel is shown in Figure 1 The front panel components are described in Table 1 For pinout diagrams of the HLU card edge connector and the craft port refer to A...

Страница 13: ...a Network Local Loopback NLOC is in effect Flashing yellow HLU 319 is in an Armed state CLEI and ECI bar code label Provides the human readable Common Language Equipment Identifier CLEI code number an...

Страница 14: ...Customer Remote Loopback Signal from customer is looped back to the customer at HLU 231 NDUn Network Doubler n Loopback Query to initiate loopback at doubler n to network where n is the number of the...

Страница 15: ...en grounded PWR FEED ON Power Feed On Indicates that the HDSL loops are not grounded or shorted PWR FEED OFF Power Feed Off HDSL span power has been turned off by setting the PWFD option to DIS or HDS...

Страница 16: ...HLU 319 front panel and push the HLU 319 into the card edge connector until it is entirely within the card guides This indicates that the card is properly seated Upon receipt of the equipment visuall...

Страница 17: ...e with downstream devices status LED flashes red One of the following occurs If downstream devices are successfully identified and the HDSL loops synchronize the HLU status LED will be a steady green...

Страница 18: ...PC to the craft port can handle all provisioning tasks Tasks that you need to complete are 1 Set the time and date see Set Clock Screen on page 19 2 Set the circuit IDs see View System Inventory Scre...

Страница 19: ...he front panel display alternately shows the first system parameter and its current setting 2 Press the SEL button to step through all possible settings one at a time of the selected parameter 3 After...

Страница 20: ...Displaying System Parameter Settings To scroll through the current settings of all system parameters press the MODE button for 2 or more seconds The following parameters are displayed HLU software ve...

Страница 21: ...o parity 8 data bits 1 stop bit hardware flow control to OFF 5 Press the several times to initiate the autobaud connection and to initialize the Maintenance Terminal screens Accessing the Maintenance...

Страница 22: ...isable loopbacks at both the network and customer side 26 View Performance Data Provides access to subscreens that allow you to view the Errored Seconds ES and Unavailable Seconds UAS between the HLU...

Страница 23: ...s screens depend on whether the system includes one two three or four doublers Press from the Maintenance Terminal Main Menu to open the Span Status screen Figure 5 on page 16 If no doubler HDU is pre...

Страница 24: ...00 00 00 dB INS LOSS 00 00 00 00 dB 24 HOUR ES 00004 00003 00006 00007 seconds 24 HOUR UAS 00014 00013 00000 00001 seconds DS1 STATUS HLU HRU 24 HOUR ES Count 00001 00002 24 HOUR UAS Count 00000 0000...

Страница 25: ...6 kHz loss The normal HiGain ATTN operation range is from 0 to 28 dB INS Loss Indicates the approximate insertion loss of the loops at the HDSL line rate of 196 kHz It is generated by multiplying the...

Страница 26: ...plex DC voltage and Loop 2 is specified to carry the simplex DC voltage SPx indicates that the first occurrence of a reversed span is on Span x where x is the number of the span CLOC Customer Local Lo...

Страница 27: ...then press The Update Remote field appears Update the HRU Time and Date The remote unit date and time is set by using this option Do one of the following Press to update the HRU to the same date and...

Страница 28: ...tion letter to change that setting Press to set all user options to the factory default values If changes were made press when exiting to confirm or press any other key to ignore changes Press to exit...

Страница 29: ...ble repeater Power PWRF DIS Disables powering to the HDSL pair See HDSL Line Voltage Options on page 25 LOW Keeps the HDSL line voltage at 140 Vdc maximum for all applications AUTO Allows the HDSL lin...

Страница 30: ...rts when either of the two HDSL loops is not in sync LOSW or if a Margin alarm occurs AIS on SMJK NREM SAIS ENA Causes the HRU to transmit the AIS signal towards the Customer Interface CI when in NREM...

Страница 31: ...T option is controlled by the BPVT user option which allows it to be Enabled ENA or Disabled DIS In addition the CRCs in each direction of every HDSL loop of each span are also counted and added in wi...

Страница 32: ...entering each channel number Multiple channels can be selected by inserting a space between each entry 3 After all the new settings have been made press to Confirm and then for Exit The new choices a...

Страница 33: ...o HDSL loops experience an out of sync LOSW condition or when a margin alarm occurs 1LP causes the 12 channels on the surviving loop to be lost as they are replaced by the AIS LOS pattern However it d...

Страница 34: ...when no doublers are present Figure 10 shows an example when four doublers are present The following options are available Type to select the Disable Loopbacks option Type to select HLU Network Loop T...

Страница 35: ...U NLOC C NETWORK LOOP HRU NREM G CUSTOMER LOOP HLU CREM H CUSTOMER LOOP HRU CLOC E xit LOOPBACK MENU TIME 00 03 33 DATE 09 15 99 CIRCUIT ID A DISABLE LOOPBACKS B NETWORK LOOP HLU NLOC M NETWORK LOOP D...

Страница 36: ...ing Figure 11 NLOC Loopback Mode Reported in the Maintenance Terminal Main Menu Disabling a Loopback The Disable Loopbacks option Figure 9 on page 27 allows you to disable cancel any of the loopbacks...

Страница 37: ...xt 4 hour data screen Press to view the next available span for doubler applications Press or to select a specific span for doubler applications Press to exit All Performance Data counters can be set...

Страница 38: ...pan HDU4 to the HRU Invalid report entries are indicated by dashes Figure 13 Performance Data Screen Four Doublers Span 5 Date 09 15 99 PERFORMANCE DATA CIRCUIT ID ERRORED SECONDS UNAVAILABLE SECONDS...

Страница 39: ...screen Press to exit from the Performance History screen Performance History Screen without Doubler Figure 14 shows a non doubler application Invalid report entries are indicated by dashes Figure 14...

Страница 40: ...id report entries are indicated by dashes Figure 15 31 Day Performance History Screen Four Doublers Span 5 Time 00 26 29 SPAN 5 PERFORMANCE HISTORY 31 DAY CIRCUIT ID ERRORED SECONDS UNAVAILABLE SECOND...

Страница 41: ...These descriptions apply to the Alarm History for doubler applications as well Table 11 Alarm History Fields and Descriptions Field Description Type Identifies the type of alarm LOS DS1 HLU First and...

Страница 42: ...DATE 09 15 99 CIRCUIT ID Type First Last Current Count LOS DS1 HLU OK 000 LOS DS1 HRU OK 000 BER OK 000 SPAN1 LOSW HDSL1 02 01 99 00 00 02 01 99 00 00 OK 001 SPAN1 LOSW HDSL2 02 01 99 00 00 02 01 99...

Страница 43: ...ower is lost The System Inventory screen displays HiGain unit serial numbers For HLU 319 List 5A units manufactured prior to August 5 1999 the screen displays only the last six digits of the serial nu...

Страница 44: ...IT PRODUCT SERIAL NUMBER UNIT ID HLU HLU 319 L5A V7 2 000004 NOT REQUIRED B HRU HRU 402 L1 V1 5 3499000400 C DB1 N A D DB2 N A F DB3 N A G DB4 N A E xit Enter the item letter to change any ID SYSTEM I...

Страница 45: ...the type of problem Figure 21 Troubleshooting Screen Describing Circuit Problem TIME 17 34 31 TROUBLESHOOTING DATE 09 15 99 CIRCUIT ID ___ ___ ___ ___ ___ ___ 1 1 1 1 1 ___ 2 ___ 2 ___ 2 ___ 2 ___ 2 _...

Страница 46: ...uto update The Troubleshooting screen indicates whether AutoUpdate is on or off Press to directly access the Loopback menu see Loopback Mode Screen on page 26 Figure 22 Troubleshooting with Help The f...

Страница 47: ...in lower than 4 dB Low margin is a result of high noise level and or low HDSL signal level Some causes of low margin Long loop External interference Excessive cross talk AUTOUPDATE OFF E xit A uto U p...

Страница 48: ...error has occurred An ERR symbol on the graph indicates a DS1 error has occurred The maximum value that can be displayed is 999 Some causes of HDSL errors Shorts interference noise Some causes of DS1...

Страница 49: ...al 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 prevents an LOS condi...

Страница 50: ...stem alarm press the SEL button and execute an Alarm Cut Off ACO An ACO turns the alarm off and replaces the ALRM message with an ACO message The second part of the ALRM message which defines the caus...

Страница 51: ...e Maintenance Terminal Main Menu when connected to the craft port of the HLU or HRU entering the loopback code into the test equipment connected to the HLU or HRU Generic Loopback Commands The HiGain...

Страница 52: ...o the customer at the HDU4 X X X CREM 1111110 6 in 7 Signal from customer is looped back to the customer at the HLU X X X SMJK LpUp PL 11000 2 in 5 SmartJack Loopup or NID PL code Invokes HRU loopback...

Страница 53: ...rk Telephone A5LB Teltrend Mod 1 Southern New England Telephone SNET Southwestern Bell Pacific Bell The A1LB loopback selection complies with that proposed for HDSL systems in the T1E1 4 92 recommenda...

Страница 54: ...or 4 Type The display changes to MAN LPBK NLOC 5 Press MODE to advance to the next available loopback ND1 ND2 ND3 ND4 NRE CRE CD1 CD2 CD3 CD4 CLO 6 Press SEL to activate the selected loopback The pre...

Страница 55: ...ualizers should be set to the distance from the DSX 1 to the shelf The transmit and receive T1 DSX 1 ports have splitting access jacks and miniature 210 series monitoring jacks as shown in Figure 1 on...

Страница 56: ...LU 319 List 5A 5 Repeat Step 2 If the test passes the problem is in the downstream direction If it fails the problem is in the upstream direction Figure 28 Loopback Configurations Pressing the Loopbac...

Страница 57: ...rrors detected by the test set varies from 229 to 231 depending on whether or not the test set counts frame errors as bit errors and on the number of frame bits contained in the block of 231 error bit...

Страница 58: ...bler 4 was sent 20 errors if ILR 2 HRU was sent d normal looped data This error pattern repeats every 20 seconds as long as the IOR loopback pattern is being sent This also applies to ILR Time out Ove...

Страница 59: ...d down disarmed and returned to normal operation send the disarm inband code 11100 or the ESF DL code FF24 The Armed mode has an automatic time out of 120 minutes but this timer is reset to 120 for an...

Страница 60: ...Binary Code a Hexadecimal Equivalent a The left most bit arrives first in all sequences The detection algorithm functions reliably with a random 10 3 Bit Error Ratio BER on the facility The entire ar...

Страница 61: ...1 Pulse Output 6 V pk pk pre equalized for 0 655 feet of ABAM cable 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 UNF...

Страница 62: ...Table 17 describes line powered circuits on 9 kft 26 AWG loops without a doubler Table 16 HDSL Loss Over Cables Cable Gauge Loop Loss a dB per kft a At 196 kHz 68 F 20 C Loop Resistance per kft 26 AW...

Страница 63: ...6 3 6 9 494 543 HRU 411 OFF 20 22 0 6 2 6 8 471 518 Table 19 HLU 319 Power Parameters Single Doubler HDU 439 or HDU 437 Lists 1 and 1B HRU Model No HRU CPE Power 42 5 Vdc Power Consumption Watts Heat...

Страница 64: ...t 1 2 3 4 OFF 30 3 33 3 8 0 8 8 713 784 HRU 412 List 6 7 8 OFF 28 1 30 9 7 7 8 5 660 726 HRU 402 N A OFF 24 8 27 3 7 2 7 9 584 642 HRU 411 OFF 27 7 30 5 7 5 8 3 652 717 Table 23 HLU 319 Power Paramete...

Страница 65: ...CEV or other enclosures are determined by applying its power parameters to the manufacturer s requirements for each specific housing The 42 5 Vdc Power Consumption is the maximum total power that the...

Страница 66: ...ement Control Bus The HLU 319 List 5A provides a Network Management Control Bus on pin 7 of the card edge connector This allows the various PairGain Management System protocols to manage the HLU throu...

Страница 67: ...edge connector see Figure 29 is the HLU 319 System Alarm output pin The following notes apply to Pin H Pin H replaces the Local Loss of Signal LLOS on normal high density 3192 repeaters The normally f...

Страница 68: ...151 01 Revision 01 60 September 17 1999 HLU 319 List 5A CRAFT PORT Figure 30 shows the pinout for the craft port connector and its connection to a DB 9 or DB 25 connector on a maintenance terminal Fi...

Страница 69: ...9 is shown in Figure 31 The HLU 319 receives a 1 544 Mbps DSX 1 data stream from the DSX 1 digital cross connect interface The HLU 319 contains a DS1 frame synchronizer controlled by an 8 bit micropro...

Страница 70: ...g high 112 Vdc applications When the circuit is active the system is compliant with Class A2 requirements of GR 1089 When the circuit is not active the system is compliant with Class A3 requirements o...

Страница 71: ...are compatible with each other Although all HiGain doublers are backward compatible with all prior HLU and HRU models some of the circuit application enhancements of newer doubler models require that...

Страница 72: ...y HDU 451 List 3 3B 4 4B HDU 437 439 HDU 404 407 409 Line Powered Local Powered Line Powered Local Powered Line Powered Local Powered HLU Model I CPE ON I CPE OFF I CPE ON I CPE OFF I CPE ON I CPE OFF...

Страница 73: ...the Customer Site portion of the PairGain Web page you need to provide a customer password If you do not have a password contact your PairGain sales representative RETURNS To return equipment to PairG...

Страница 74: ...on for returning the equipment please let us know so we can determine how best to help you 4 Pack the equipment in a shipping carton 5 Write PairGain s address and the Return Material Authorization RM...

Страница 75: ...ure CLEI Common Language Equipment Identifier HRU HiGain Remote Unit CLOC Customer Local Loopback I CPE Current amperes requirements for Customer Premises Equipment CO Central Office ILR Intelligent L...

Страница 76: ...OTS Plain Old Telephone Service SPLB Special Loopback PPM Pulse Position Modulation STS Span Terminating Shelf PWRF Power Feed TEC Total Error Count RCV Receive TLOS LB Transmit Loss of Signal Loopbac...

Страница 77: ...correct customer installation and regular maintenance PairGain will repair or replace at PairGain s option any unit without cost during this period if the unit is found to be defective for any reason...

Страница 78: ...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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