Nortel Networks Circuit Card 311 User Manual

Page 985

Architecture

985

•

transmit data input

•

receive clock output

•

transmit clock output

The receive and transmit clocks can be of slightly different bit rates from
each other as determined by the transmit and receive carrier clocks.

The NTBK50 supports a D-Channel Handler Interface (DCHI)
daughterboard. It is equivalent to a single port of an NTAK02 SDI/DCH card.
The NTBK50 also supports a Downloadable D-Channel Handler interface
(DDCH) daughterboard. The DDCH brings MSDL D-channel capability to
the system.

The D-channel support interface is a 64 kbps, full-duplex serial bit stream
configured as a DCE device. The data signals include: (1) Receive data
output, (2) transmit data input, (3) receive clock output, and (4) transmit clock
output. The receive and transmit clocks can be of slightly different bit rates
from each other as determined by the transmit and receive carrier clocks.

The NTBK50 supports a daughterboard D-channel handler interface (DCHI).
It is the equivalent to a single port of an NTAK02 SDI/DCH card. As well, the
NTBK50 supports a Downloadable D-channel handler interface (DDCH). It
brings the MSDL D-channel capability into the Option 11C system.

The D-channel support interface is a 64 Kbps, full-duplex serial bit stream
configured as a DCE device. The data signals include:

•

receive data output

•

transmit data input

•

receive clock output

•

transmit clock output

The receive and transmit clocks can be of slightly different bit rates from
each other as determined by the transmit and receive carrier clocks.

DCHI Configuration for NTAK93 only (SW1)

The NTAK93 DCHI daughterboard can be operated in two separate modes
defined by an on-board dip switch. It can operate in a standard DCHI mode
common to most ISDN standard countries. It can also operate in a DPNSS

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311

01.04

Standard

Release 5.0

23 May 2008