Nortel Succession 1000 Installation And Configuration Manual page 48

Page 48 of 396 ISDN Primary Rate Interface equipment overview
553-3001-201 Standard 1.00
The following is a brief description of each element on the faceplate.
Enable/Disable Switch
This switch is used to disable the card prior to insertion or removal from the
network shelf. While this switch is in disable position, the card will not
respond to the system CPU.
ENET LEDs
Two red LEDs indicate if the "ENET0" and "ENET1" portions of the card are
disabled. These LEDs are lit in the following cases:
• When the enable/disable switch is in disabled state (lit by hardware).
• After power-up, before the card is enabled.
• 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".
October 2003