T1 Digital Line Card - 3Com 3C10111C - NBX 100 - Modular Exp Base Installation Manual

30 C 1: I
HAPTER NTRODUCTION

T1 Digital Line Card

Initialization (Release R4.1 and higher):
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 call processor.
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.
The T1 Digital Line Card is an optional card that lets you connect a T1 line
to the NBX system. The SuperStack 3 NBX system can accommodate up
to 30 T1 Digital Line Cards (720 channels) if they are configured for DS1
operation, and 31 T1 Digital Line Cards (713 channels) if they are
configured for ISDN PRI operation. The NBX 100 system can
accommodate up to 3 T1 Digital Line Cards (72 channels if the cards are
configured for DS1 operation or 69 channels if the cards are configured
for ISDN PRI operation), if you connect them using MDI-X ports. If you
connect a T1 Digital Line Card using the NBX 100 system backplane, the
system can accommodate only one card.
All digital line cards require NBX system software Release R2.6 or higher.
The 3C10116D T1 Digital Line Card requires NBX system software Release
R4.3 or higher.
You must have an external Channel Service Unit (CSU) when using 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.
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).