Page 1: Table Of Contents
3. LOOPBACK DESIGN DESCRIPTION 4. TESTING PROCEDURES 5. SYSTEM MAINTENANCE MENU SCREENS Figure 1. ELU-319, List 5D and 6D Front Panel. The CAUTION PairGain ELU-319, List 5D and 6D can be used in This product incorporates static sensitive conjunction with the ERU-412 remote unit and either one components.
Page 2: General
This is in contrast to • Improved tolerance to cable noise the ELU-319 List 5 and 6 which can only line power • Line powers two EDU-451 doublers or one one doubler or one ERU remote unit. The HiGain EDU and ERU.
Page 3: Applications
6.6 km 7.3 km 8.0 km Kbps of overhead. 3.02 A block diagram of the ELU-319 is shown in 2. APPLICATIONS Figure 2. The HiGain ELU-319 receives a 2.048 Mbps data stream from the G.703 digital 2.01 The HiGain System provides a cost- cross-connect interface.
Page 4 G.703 rates of 2.048 Mbps with up to ±50 ppm of offset. Figure 2. ELU-319 Block Diagram. PairGain’s HDSL technology provides full-duplex services at 2.048 Mbps over copper wires between an ELU-319 and an ERU-412 or EDU-451.
Page 5: Alarms
MNRALM output alarm bus on pin H on a minor alarm event. 4.02 Pin H of the ELU-319 is the minor alarm The STATUS LED still flashes red and the ALRM (MNRALM) output pin. This pin must never operate above 0V or below -60V.
Page 6 Section 150-319-254 Revision 02 Figure 3. ELU-319 Pin-Outs. The active pins are highlighted in black in this illustration Page 6...
Page 7 Displays the Margin Alarm Threshold (in dB),that is set using the RS- Threshold) 232 Maintenance port. If the margin on either loop drops below this value, a minor alarm is reported (MAL1 or MAL2). The factory Default is 4. * Indicates the ELU-319 factory settings. Page 7...
Page 8: Options
The ELU-319 stores the settings of the system parameters in non-volatile RAM to prevent their loss in the event that shelf power is lost or the ELU-319 is unplugged. 5.03 No DIP-switches or jumpers are required to set the ELU-319 configuration.
Page 9: Hdsl Line Voltage Option
HDSL Loop 1 or 2 drops below this value , ground fault currents, which improves the product’s safety. the ELU-319 triggers a minor alarm, and the front The safety issue thus depends solely on the differential panel and status screen displays “MAL1” (Loop 1) or voltage across loop 1 and loop 2, and is independent of “MAL2”...
Page 10 Power Consumption access (75 ohm or 120 ohm) to each of the 22 slots. 12 watts (no doubler), 21 watts (doublers) The ELU-319 slot pin-outs are shown in Figure 3. Heat Dissipation 8. SPECIFICATIONS 6 watts (no doubler), 8 watts (doublers)
Page 11: Installation
These three parameters for the ELU-319 on a per 10.03 If a unit needs repair, call PairGain for a slot and per shelf basis, are as follows:...
Page 12: Loopback Design Description
When a LOS partitioned into two equal halves; each should be condition exists the ELU-319 simply outputs the AIS fused at 10 A for a total of 20 A per shelf. A fully signal which alerts the network that a LOS condition loaded shelf draws 6.2 A worse case.
Page 13: Testing
Section 150-319-254 Revision 02 Figure 5. ELU-319 Loopback Configurations. All loopbacks (with the exception of the TLOS logic loopback) can be initiated from the front panel pushbuttons or from the maintenance terminal. If you encounter trouble with the G.703 4. TESTING 4.02...
Page 14 SEL button on the ELU-319 front panel. SELF TEST The ELU-319 is in a self test mode. This occurs every power ON cycle. The self-test sequence includes the input G.703 transceiver chip when the HDSL loops are not in sync. This can cause the AIS pattern, normally transmitted from the ELU during this time, to exhibit bipolar violations (BPVs).
Page 15 Indicates that no signal is detected at the G.703 input to the ERU-412. Causes a minor alarm. G.703 G.703 BPV errors Indicates that the number of BPVs at the ELU-319 or ERU-412 G.703 inputs have exceeded the 24-hour ES threshold. Causes a minor alarm. MAL1(2)
Page 16 NREM Network Remote Loopback Loopback at ERU-412 (remote) towards network initiated from ERU-412 front panel pushbutton, or maintenance terminal, or by pressing both the MODE and SEL pushbuttons on the ELU-319 front panel. See Figure 5. NLOC Network Local Loopback Loopback at ELU-319 (local) towards network by pressing both the MODE and SEL pushbuttons on the ELU-319 front panel.
Page 17: System Maintenance Menu Screens
Term Definition MARGINS Indicates the excess signal to noise ratio, at either the ELU-319 or ERU-412, relative to a 10 Bit Error Rate. 1st value is current margin, 2nd value is minimum margin since (C)leared last, 3rd value is maximum value since cleared, and NA means Not Available (loops are not synchronized).
Page 18 The “Count” column lists the number of screens at both the ELU-319 and the ERU-412. The times each alarm occurred. All the data can be RS-232 terminal interface at the ERU-412 does not cleared by pressing C (Clear).
Page 19 Section 150-319-254 Revision 02 Figure 6. Main Menu. Figure 7. Span Status Display (no Doubler). Page 19...
Page 20 Section 150-319-254 Revision 02 Figure 8. Set Clock Menu. Figure 9. System Settings Menu. Page 20...
Page 21 Section 150-319-254 Revision 02 Figure 10. Loopback Menu (no Doubler). Figure 11. Performance Data Display (no Doubler). Page 21...
Page 22 Section 150-319-254 Revision 02 Figure 12. Performance Data History Display (no Doubler). Figure 13. Alarm History (no Doubler) Page 22...
Page 23: Applications Using Higain Doubler
PairGain HMS-318 shelf. The worst case reserve for emergency situations. It thus limits the application for the ELU-319 occurs on a loop with maximum number of plugs per remote enclosure. one EDU-451 Doubler and four 3.3 km foot, 0.4 mm Use this data to perform other appropriate analysis spans.
Page 24: Loopback Design Description
Section 150-319-254 Revision 02 3. LOOPBACK DESIGN DESCRIPTION next loopback option is presented by pressing the MODE push-button however, the previously 3.01 All HiGain ELU/ERU system loop-up codes executed loopback will remain active until the SEL must be initiated from either the front panel push-button is pressed and a different loopback is pushbuttons or from the maintenance terminal.
Page 25 Section 150-319-254 Revision 02 Figure 14. ELU-319 Doubler Loopback Configurations. Each module (four in a full two-doubler system) can be looped back toward either the network or customer. Page 25...
Page 26: Testing Procedures
TABLE 8. ELU-319 FOUR-CHARACTER FRONT PANEL MESSAGES Message Full Name Description CREM Customer Remote Loopback Signal from customer is looped back to customer at ELU-319. NLOC Network Local Loopback G.703 signal is looped back to G.703 at ELU-319. HDU1 Network Doubler 1 Loopback...
Page 27 SEL button on the ELU-319 front panel. SELF TEST The ELU-319 is in a self test mode. This occurs every power ON/OFF cycle. The self-test sequence includes the input G.703 transceiver chip when the HDSL loops are not in sync. This can cause the AIS pattern, normally transmitted from the ELU during this time, to exhibit bipolar violations (BPVs).
Page 28 Loopback at ERU-412 (remote) towards network initiated from ERU-412 front panel pushbutton, or maintenance terminal, or by pressing both the MODE and SEL pushbuttons on the ELU-319 front panel. See Figure 4. NLOC Network Local Loopback Loopback at ELU-319 (local) towards network by pressing both MODE and SEL pushbuttons on the ELU-319 front panel.
Page 29 Message Full Name Description CDU 1 Customer Doubler 1 Loopback Loopback at Doubler 1 towards CI initiated by ELU-319 front panel MANUAL LOOPBACK push-buttons, or maintenance terminal (Figure 14). CDU 2 Customer Doubler 2 Loopback Loopback at Doubler 2 towards CI initiated by ELU-319 front panel MANUAL LOOPBACK push-buttons, or maintenance terminal (Figure 14).
Page 30: System Maintenance Menu Screens
Term Definition MARGINS Indicates the excess signal to noise ratio, at either the ELU-319 or ERU-412, relative to a 10 Bit Error Rate. 1st value is current margin, 2nd value is minimum margin since (C)leared last, 3rd value is maximum value since cleared, and NA means Not Available (loops are not synchronized).
Page 31 NLOC, NREM, CLOC and master module, this clears all performance data CREM are available for non-Doubler applications. screens at both the ELU-319 and the ERU-412. The RS-232 terminal interface at the HRU-412 does not 5.07 Figure 23 through Figure 26 show the allow the counters to be cleared.
Page 32 Section 150-319-254 Revision 02 Figure 15. Main Menu. Figure 16. Span Status Display (no Doublers). Page 32...
Page 33 Section 150-319-254 Revision 02 Figure 17. Span 1 Status Display (one or two Doublers). Figure 18. Span 2 Status Display (two Doublers). Page 33...
Page 34 Section 150-319-254 Revision 02 Figure 19. Span 3 Status Display (two Doublers). Figure 20. Set Clock Menu. Page 34...
Page 35 Section 150-319-254 Revision 02 Figure 21. System Settings Menu. Figure 22. Loopback Menu (one Doubler). Page 35...
Page 36 Section 150-319-254 Revision 02 Figure 23. Performance Data Span 1. Figure 24. Performance Data Span 2. Page 36...
Page 37 Section 150-319-254 Revision 02 Figure 25. Performance Data Span 3. Figure 26. Performance History Span 1. Page 37...
Page 38 Section 150-319-254 Revision 02 Figure 27. Performance History Span 2 Figure 28. Performance History Span 3 Page 38...
Page 39 Section 150-319-254 Revision 02 Figure 29. Alarm History Span 1. Figure 30. Alarm History Span 2. Page 39...
Page 40 Section 150-319-254 Revision 02 Figure 31. Alarm History Span 3 Copyright © 1996, PairGain Technologies, Inc. PairGain is a registered trademark, CopperOptics and HiGain are trademarks of PairGain Technologies, Inc. Page 40...

This manual is also suitable for:

150-1236-54 150-1236-64

PairGain ELU-319 Manual

Quick Links

Related Manuals for PairGain ELU-319

Summary of Contents for PairGain ELU-319

This manual is also suitable for:

Table of Contents