Avaya S8700 Maintenance Manual page 2154

Maintenance-Object Repair Procedures
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.
metallic connection
optical fiber
SNI
TN573
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
Fiber out of Frame
In frame, No Neighbor
SNI active
SNI standby
1. The fiber is in frame but a communication problem exists to the
neighbor.
8-1432 Issue 1 May 2002
or
DS1C
TN574
1 to 4 DS1 Facilities
LED on
0.1 second
1
0.5 second
solid on
never on
metallic connection
or
optical fiber
DS1C EI
TN574 TN570
LED off
0.1 second
0.5 second
never off
solid off
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