Nortel Networks 553-3001-211 manual 752 of 894 NTAK93 D-channel Handler Interface daughterboard

Page 752 of 894 NTAK93 D-channel Handler Interface daughterboard

—system parameters are service changeable (system parameters are downloaded from software)

—incoming Layer 3 message validation procedures are implemented in the D-PORT firmware

—supported message units and information elements can be service changed

—translation of the CCITT message types information elements into a proprietary coding scheme for faster CPU operation

—convention of IA5-encoded digits to BCD-encoded digits for incoming layer 3 messages for faster CPU operation

—self-test

—loopback

Physical description

The DCH function can be installed in the main and IP expansion cabinets. The DTI/PRI card which carries a DCH daughterboard resides in the main and IP expansion cabinets.

553-3001-211 Standard 2.00 September 2004