Overview; Features And Functions; Physical Description - Nortel Enterprise 1000 Reference Manual

Page 188 of 236

Overview

Features and functions

Physical description

553-3023-211 Standard 1.00 June 2001
NTBK51 Downloadable D-channel Handler daughterboard
The NTBK51 daughterboard provides Downloadable D-channel Handler
(DDCH) interfaces based on the Multipurpose Serial Data Link (MSDL). The
DDCH provides a single purpose full-duplex serial port capable of
downloading the D-channel application and base software into the card.
The NTBK51 provides the following features and functions:
• ISDN D-channel related protocol
• Selftest
• Loopback
• D-channel loadware including:
— management and maintenance
— LAPD- software for data link layer processing
— DCH interface
— layer 3 preprocessor
— traffic reporting including link capacity
The NTBK51 daughterboard interfaces with the Succession Communication
Server for Enterprise (CSE) 1000 CPU and is mounted on either the NTAK09
1.5 DTI/PRI card or the NTBK50 2 Mb PRI digital trunk card. The digital
trunk card can be installed in Slot 1, 2, and 3 of the Succession CSE 1000
Media Gateway. Digital trunk cards are not supported in Media Gateway
Expansions.
The NTBK51 daughterboard, when installed on the NTAK09 digital trunk
card, is addressed in the same slot as the NTAK09.