Nortel Networks Circuit Card 311 User Manual
Page 385
Functional description
385
•
perform activation and deactivation of DSLs
•
provide loopback control of DSLs
Each U interface provides two B-channels and one D-Channel and supports
one physical termination. This termination may be to a Network Termination
(NT1) or directly to a single U interface terminal. Normally this physical
termination is to an NT1, which provides an S/T interface that allows up to 8
physical terminals to be connected. The length of a DSL depends on the
specific terminal configuration and the DSL wire gauge, however, it should
not exceed 5.5 km (3.3 mi).
The main functions of the UILC are:
•
provide eight ISDN U interfaces conforming to ANSI standards
•
support point-to-point DSL terminal connections
•
provide channel mapping between ISDN BRI format (2B+D) and
Meridian 1 bus format
•
multiplex 4 D-channels onto one timeslot
•
perform activation and deactivation of DSLs
•
provide loopback control of DSLs
Each U interface provides two B-channels and one D-channel and supports
one physical termination. This termination can be to a Network Termination
(NT1) or directly to a single U interface terminal. Usually, this physical
termination is to an NT1, which provides an S/T interface that supports up
to eight physical terminal connections. The length of a DSL depends on the
specific terminal configuration and the DSL wire gauge; however, it should
not exceed 5.5 km (3.3 mi).
The main functions of the UILC are as follows:
•
provide eight ISDN U interfaces conforming to ANSI standards
•
support point-to-point DSL terminal connections
•
provide channel mapping between ISDN BRI format (2B+D) and CS
1000 bus format
•
multiplex four D-channels onto one timeslot
•
perform activation and deactivation of DSLs
•
provide loopback control of DSLs
Micro Controller Unit (MCU)
The Micro Controller Unit (MCU) coordinates and controls the operation of
the UILC. It has internal memory, a reset and sanity timer, a serial control
interface, a maintenance signaling channel, and a digital pad.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.