Nortel Networks NN43001-301 - Manual (Page 57)

NT5D12 Dual-port DTI/PRI 57
Figure 22
Clock Controller - Option 4
NT5D12 Dual-port DTI/PRI
The NT5D12 is a dual-port 1.5 DTI/PRI card (the DDP firmware functions in
DTI or PRI mode) integrating the functionality of two QPC472 DTI/DDP2
PRI cards and one QPC414 ENET into one card. The NT5D12 occupies a
single Network shelf slot and provides two DTI/PRI network connections,
an optional connection to an external D-Channel Handler, the QPC757
D-Channel Handler Interface (DCHI) or NT6D80 Multipurpose Serial Data
Link (MSDL), and an optional plug-on NTBK51AA Downloadable D-Channel
daughterboard (DDCH.)
The NT5D12 DDP card supports all features (except the echo canceller and
protocol conversion) of the QPC720. In addition, it maintains the backward
compatibility of QPC720.
The NT5D12 DDP card hardware design uses a B57 ASIC E1/T1 framer.
The carrier specifications comply with the ANSI TI.403 specification. The
NT5D12 provides an interface to the 1.5 Mb external digital line either
directly or through an office repeater, Line Terminating Unit (LTU), or
Channel Service Unit (CSU).
Nortel Communication Server 1000
ISDN Primary Rate Interface Installation and Commissioning
NN43001-301 02.03 Standard
Release 5.5 7 December 2007
Copyright © 2003-2007, Nortel Networks
.