Black Box COMPACT T1 - Manual (Page 39)

Compact T1 - Release 6.1 35
Quick Start
Service Cards
ISDN BRI Card
There is an LED for each ISDN BRI on a card, as described in the table below:
OCU-DP Card
There are two LEDs for each channel on the OCU-DP card. The function for each LED
is listed below:
State Description
Off Line U-interface is attempting synchronization, or BRI is Out-of-Service.
Red Line alarm (LOS or self test failure)
Yellow ES or SES has occurred.
Flashing yellow Line U-interface is synchronized with customer equipment, but is not
passing customer data.
Flashing green Line U-interface is in external loopback toward the switch at the unit.
Green Normal (Line U-interface is active and transparently passing customer data)
State Description
Yellow Flickering ALL Boot Software in control.
Green (walking down)
Red (walking up) ALL Application Software in control
(repeated 3.5 times).
Red, slow flash ALL In Boot. Application flash code checksums did not
match and Boot is waiting for application download.
Red ALL In Application code waiting for Controller to issue SW/
HW revision request. This is the first request that comes
from the OCU-DP card manager in the Controller.
Green
Yellow Top
Bottom Port in Self-test. Duration is 5-8 seconds.
Off Top
Bottom Port is set down (Out-Of-Service).
Green Top Port is receiving valid signals.
Red Top Port is receiving no signal (primary) or no frame sync
(secondary or clear channel).
Red Flashing Bottom Port is receiving bipolar violations
Yellow Bottom Port is in loopback.