Avaya 03-300430 User Manual

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.

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:

metallic connection

or

optical fiber

metallic connection

or

optical fiber

1 to 4 DS1 Facilities

TN570 

TN574 

TN574 

TN573

SNI

DS1C DS1C 

EI

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