3Com V3000 ANALOG, Installation Manual

Page: 43 / 252

NBX Cards and Devices 43
used in a Gateway Chassis, do not use this connector because the
chassis has an Ethernet connector to connect the chassis to the LAN.
If you use the Uplink connection, be sure to program the switch or router
at the other end for 10BASE-T 10 MB operation.
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Console — This DB-9 connector provides an RS-232 (DCE) TTY
terminal connection for maintenance access.
Each 3C10165D E1 Digital Line Card has the following lights and
connectors:
■
E1 — This RJ-48C connector makes a patch cord connection to a E1
interface.
■
Status Lights — These lights indicate the status of the card’s
signaling, synchronization, and loop back test.
■
CO — Central Office:
Amber — Alarm condition at the remote end or the CO is not
connected or available.
Green — No alarm condition.
■
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
that the POST test failed.
Green — POST test completed successfully.
■
DCH — D channel status of an ISDN PRI connection
Off — No E1 or E1 PRI line is attached.
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 NCP.