Maintenance-Object Repair Procedures
555-233-143
8-1432
Issue 1 May 2002
Remote EPNs
A DS1 converter complex can used to provide connectivity to a remotely located
port network. The DS1 converter complex consists of two TN574 DS1 converter
(DS1C) circuit packs connected by 1 to 4 DS1 facilities. The DS1C complex is
administered as a fiber link.
Figure 8-83.
Fiber Link over a DS1 Converter Complex
SNI LEDs
The SNI circuit pack has red, green, and yellow LEDs. The red and green LEDs
have the usual meaning, with red signifying an on-board alarm, and green
signifying maintenance testing in progress. The red and green LEDs will come on
and then turn off when the circuit pack is reset.
NOTE:
If the red LED is on without any alarms active against the circuit pack,
replace the SNI circuit pack. This indicates that SNI firmware has detected
a fault and is unable to notify software.
The yellow LED indicates status information as follows:
SNI Yellow LED states
Condition
LED on
LED off
Fiber out of Frame
0.1 second
0.1 second
In frame, No Neighbor
1
1.
The fiber is in frame but a communication problem exists to the
neighbor.
0.5 second
0.5 second
SNI active
solid on
never off
SNI standby
never on
solid off
metallic connection
or
optical fiber
metallic connection
or
optical fiber
1 to 4 DS1 Facilities
TN570
TN574
TN574
TN573
SNI
DS1C DS1C
EI
Summary of Contents for S8700 Series
Page 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Page 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Page 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Page 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Page 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Page 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...