Nortel Networks NN43001-301 manual Trunk Disable DIS LEDs, OOS LEDs, NEA LEDs, FEA LEDs, LBK LEDs

38ISDN Primary Rate Interface equipment overview

•When the ENET port on the card is disabled by software.

Trunk Disable (DIS) LEDs

Two red LEDs indicate if the "trunk port 0" or "trunk port 1" portions of the card are disabled. These LEDs are lit in the following cases:

•upon reception of the "disable loop" message from the software

•after power-up

OOS LEDs

Two yellow LEDs indicate if the "trunk port 0" and "trunk port 1" portions of the card are out-of-service.

NEA LEDs

Two yellow LEDs indicate if the near end detects absence of incoming signal or loss of synchronization in "trunk port 0" or "trunk port 1" respectively. The Near End Alarm causes a Far End Alarm signal to be transmitted to the far end.

FEA LEDs

Two yellow LEDs indicate if a Far End Alarm has been reported by the far end (usually in response to a Near End Alarm condition at the far end) on "trunk port 0" or "trunk port 1".

LBK LEDs

Two yellow LEDs indicate if a remote loopback test is being performed on trunk port 0 or trunk port 1. The loopback indication is active when the digital trunk is in remote loopback mode. Normal call processing is inhibited during the remote loopback test.

DCH LED

When the dual colored LED is red, it indicates the onboard DDCH is present but disabled. When the dual colored LED is green, it indicates the onboard DDCH is present and enabled. If a DDCH is not configured on the DDP2 card, this lamp is not lit.

Unit 0 Clk Connectors

Two RJ11 connectors for connecting:

•Digital trunk unit 0 recovered clock to primary or secondary reference source on clock controller card 0.

•Digital trunk unit 0 recovered clock to primary or secondary reference source on clock controller card 1.

Nortel Communication Server 1000

ISDN Primary Rate Interface Installation and Commissioning

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

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