3Com V3000 ANALOG, Installation Manual

Page: 40 / 252

40 C
HAPTER
1: I
NTRODUCTION
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Status Lights — These lights indicate the status of the T1 card’s
signaling, synchronization, and loop back test.
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CO — Central Office:
Amber — Alarm condition at the remote end or the CO is not
connected or available.
Green — No alarm condition.
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POST — Power On Self Test
Off — POST test is running. The test runs approximately 5 seconds
after you apply power to the board. After 5 seconds, Off indicates
the POST test failed.
Green — POST test completed successfully.
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DCH — D channel status of an ISDN PRI connection
Off — No T1 or T1 PRI line is attached or the card does not need a
D channel, such as when the card is running T1-robbed-bit.
Green — Card is configured for ISDN PRI operation and an active
PRI connection has been established.
Amber — The D channel has not yet been established. It can take
several seconds after the card has completed its power up tests for
the card to establish a connection with the PRI trunk. If the DCH
light goes to amber after the connection has been established, it
can mean that an active control channel connection through the
PRI line has been lost.
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DNLD — Download
Flash — The card is downloading software from the NBX Network
Call Processor.
Green — The download is complete or the Power-On-Self-Test
(POST) is running.
Amber — The download was interrupted before it was completed.
On a LAN, the download process runs quickly. If the download
from NCP to digital line card must travel a routed network path,
the download can take a few minutes. If the DNLD light remains
amber, it can indicate a severely congested network or a hardware
problem with the T1 card.
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CALL — Call audio traffic
Off — No audio traffic on the T1 link.