3Com V3000 ANALOG, Installation Manual

Page: 38 / 252

38 C
HAPTER
1: I
NTRODUCTION
Each Analog Line Card contains the following lights and connectors:
■
Status Lights (1 through 4) — Each light shows the status of the
associated line.
Initialization:
■
Fast steady blink — Waiting for software download.
■
Solid on — Software has been downloaded. The flash memory on
the board is being loaded.
■
Slow, non symmetric blinking pattern — Waiting for the
completion of the binding process to the NCP.
Operation:
■
Off for 9 to 10 seconds, on briefly — Idle, the line is not in use.
■
On for 9 to 10 seconds, off briefly — A telephone call is
connected on this port.
■
Console Connector — This DB-9 connector provides an RS-232
(DCE) TTY terminal connection for maintenance access.
T1 Digital Line Card The optional T1 Digital Line Card lets you connect a T1 line to the NBX
system. When configured as standard T1 (DS1), the T1 card supports
in-band signaling of 24 DS0 (64 Kbps) “voice” channels and a variety of
signaling types and protocols. The T1 carries data at a rate of 1.544
Mbps. When configured as ISDN PRI, the T1 card supports 23 voice
channels with PRI services such as Direct Inward Dialing (DID).
You must have an external Channel Service Unit (CSU) when you use the
3C10116C
T1 Digital Line Card. 3C10116D includes an onboard CSU.
The 3C10116D can provide CSU performance statistics, supports
loopback testing, and can be configured as a remote device that
communicates with its NCP over a routed network.
CAUTION: 3C10165D E1 Digital Line Cards and 3C10116D T1 Digital
Line Cards can have their flash memory corrupted if you remove power
from the cards or remove the cards from the NBX chassis while they are
receiving their download after a system upgrade.
ISDN PRI services require specific circuit provisioning, which you must
obtain before you can use the T1 card in PRI mode. See
Appendix B for
more information.