Demand test descriptions and error codes - Avaya Support

Remote PNs
A DS1 converter complex can 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 71: Fiber Link over a DS1 Converter Complex
SNI LEDs
metallic connection
or
optical fiber
1 to 4 DS1 Facilities
metallic connection
or
optical fiber
SNI DS1C DS1C EI
TN573
TN574
TN574
TN570
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:
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:
Table 235: SNI Yellow LED states
Condition LED on LED off
Fiber out of Frame 0.1 second 0.1 second
In frame, No Neighbor 1
0.5 second 0.5 second
SNI active solid on never off
SNI standby never on solid off
1. The fiber is in frame but a communication problem
exists to the neighbor.
864 Maintenance Alarms for Communication Manager, Media Gateways and Servers