Nortel Networks Circuit Card - Manual (Page 763)

Page 763 of 906
Circuit Card Description and Installation
768
NTAK93 D-channel Handler
Interface daughterboard
Contents
This section contains information on the following topics:
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 763
Physical description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 764
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 765
Introduction
The NTAK93 provides the D-channel handler interfaces required by the
ISDN PRI trunk.
The DCHI performs D-channel Layer 2 message processing and transfers
Layer 3 signaling information between two adjacent network switches. It is
mounted on the NTAK09 1.5 Mb DTI/PRI card or the NTBK50 2.0 Mb PRI
card (installed in the MG 1000S) using standoff reference pins and
connectors. The NTAK93 daughterboard, when mounted on the NTBK50
PRI digital trunk card, is addressed in the same slot as the NTBK50. The
NTAK93 daughterboard can use SDI I/O addresses 1 to 15 and port 1.
The NTAK93 provides the following features and functions:
• D-channel interface or DPNSS interface
• Special features included for LAPD implementation at DCH: