Nortel Networks 553-3001-211 manual Power consumption is +5 V at 1900 mA

Page 374 of 894 NT6D71 UILC Line card

Power consumption

Power consumption is +5 V at 1900 mA.

Functional description

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 system 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.

The memory consists of 32 K of EPROM that contains the UILC operating program and 8 K of RAM that stores interface selection and other functions connected with call activities.

The reset and sanity timer logic resets the MCU.

553-3001-211 Standard 2.00 September 2004