PairGain T1L2F10A, Manual

Page: 46 / 76

Provisioning 150-231-185-05, Revision 05
38 September 13, 1999 HLU-231 List 8E
To display the circuit Help diagram ( Figure 22 ), press . The symbol legend used to describe all circuit events
and the corresponding troubleshooting tips are located beneath the Help diagram. A troubleshooting symbol on
the diagram identifies the location of a problem.
Those legend symbols which appear in parentheses are also keyboard commands for obtaining additional
information.
• Press to display margin values for the circuit ( Figure 23 on page 39 ).
• Press to display the insertion loss values for the circuit ( Figure 24 on page 39 ).
The Troubleshooting screens use the following navigational keyboard commands:
• Press the (Help), (Margin Values), or (Insertion Loss) toggle keys to enter or exit the respective
troubleshooting screen.
• Press to return to the Maintenance Terminal Main Menu.
• Press to return to the main Troubleshooting screen from the Help, Margin Values or Insertion Loss screens.
• Press to update a screen.
• Press to automatically update the screen. (Press again to deactivate auto 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 first channel reversal (R) of the circuit closest to the line unit is indicated on the
Troubleshooting screen. If another channel reversal exists, it will be identified as soon as the
preceding channel reversal is corrected.
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0
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+ 0 ,
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8
$ $
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TIME: 00:30:04 TROUBLESHOOTING with HELP
DATE: 09/15/99 CIRCUIT ID#:
___ ___ ___ ___ ___ ___
| | 1 | | 1 | | 1 | | 1 | | 1 | |
>>>>| |=======| |=======| |=======| |=======| |=======| |>>>>
<<<<| |=======| |=======| |=======| |=======| |=======| |<<<<
|___| 2 |___| 2 |___| 2 |___| 2 |___| 2 |___|
NTWK HLU HDU1 HDU2 HDU3 HDU4 HRU CUST
SYSTEM OPERATIONAL
SYMBOLS DESCRIPTIONS TROUBLESHOOTING
) ( LOOPBACK: ) - Network loopback; ( - Customer loopback
X HDSL loop not in sync Bad connection
(M) Low Margin Alarm Poor HDSL signal, long loop, interference
(I) High Insertion Loss Long loops, bridged taps
(C) HDSL Errored Second Shorts, interference, noise
(N) HDSL Unavailable Second Shorts, interference, noise
R Channel Reversal Channel Reversal nearest HLU is diplayed
E(R)R DS1 Errored Second Errors include BPV, framing, CRC
L(O)S DS1 Unavailable Second Loss of T1 signal at input
AIS Alarm Indication Signal Far end LOS, HDSL LOSW, loopbacks or MAL
AUTOUPDATE OFF (E)xit (A)uto(U)pdate (B)ack (L)oopbacks