Avaya 03-300430 User Manual

The following terms are used in the error descriptions:

The amber LEDs on the three types of boards, SNI (TN573), EI (TN570), and DS1 Converter 
(TN574 or TN1654), that may be a part of the fiber link can help in diagnosing problems with the 
fiber link. The amber LED states are as follows. The flashing LED patterns take precedence 
over the active or standby LED patterns.
If both endpoints of a fiber link (EI and/or SNI) are flashing with a fiber out of frame pattern, a 
fast amber LED pattern (0.1 second on and 0.1 second off), check the lightwave transceivers (if 
present). Both lightwave transceivers on the fiber link must be of the same type. The 9823a 
shortwave transceiver and the 9823b longwave transceiver must never be combined on the 
same fiber link because a fiber out-of-frame condition will exist. The 9823a lightwave 
transceiver should be used for distances up to 4900 feet and the 9823b lightwave transceiver 
should be used for distances up to 25,000 feet.

Control Path

The path between the two fiber endpoints that is necessary for the two 

endpoint circuit packs to communicate.

Circuit Path

The path between the two fiber endpoints that is necessary for circuit switched 

phone calls to work.

Neighbor

The circuit pack on the other end of the fiber.

Out of Frame A circuit pack reports fiber out of frame if it cannot detect valid data coming 

from the fiber.

Packet Path

The path between the two fiber endpoints that is necessary for 

packet-switched messages to be sent between the two fiber endpoints.

Fiber out of Frame

0.1 second 0.1 second

In Frame, No Neighbor

1

1. The fiber is in frame, but no communication exists to 

the neighbor

0.5 second 0.5 second

SNI active

Solid on

Never off

SNI standby

Never on

Solid off