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SNI-BD (SNI Circuit Pack)
Issue 1 June 2005 2049
Remote PNs
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 120: 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:
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:
metallic connection
or
optical fiber
metallic connection
or
optical fiber
1 to 4 DS1 Facilities
TN570 TN574 TN574 TN573
SNI
DS1C DS1C EI
Table 747: 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