Overview; Features And Functions; Physical Description - Meridian Nortel 1 Option 11C Technical Reference Manual

Page 520 of 544

Overview

Features and functions

Physical description

553-3011-100 Standard 14.00
NTBK51 Downloadable D-channel handler
The NTBK51 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
— Meridian 1 DCH interface
— layer 3 preprocessor
— traffic reporting including link capacity
The Downloadable D-channel (NTBK51) is a daughterboard that mounts on
either the NTAK09 1.5 DTI/PRI or the NTBK50 2 Mb PRI card. The DDCH,
in conjunction with the NTAK09/NTBK50 circuit card, can reside in any
physical slot 1-9 of the main cabinet and 11-19, 21-29, 31-39, or 41-49 of an
IP Expansion cabinet.
January 2002