Nortel NT9X53AC (telecommunications transmission and networking portfolio) Telecom System Card / Module

The Nortel NT9X53AC is a DMS-Bus System Clock card for the Nortel DMS-100 central-office digital switching platform, part of the documented NT9X/NTAK-prefixed material-code family used across DMS-100 and DMS-100E switching system cards. The System Clock card generates and distributes the master timing reference the DMS-Bus and its connected peripheral modules synchronise to, a function central to keeping the exchange’s digital switching fabric aligned. DMS-100 exchanges of this generation remain in service in a number of established telecoms networks, and genuine spares such as this one are a routine requirement for maintaining full timing redundancy or replacing a failed clock card. Tech-Star (UK-based, shipped worldwide) stocks Nortel DMS-100 cards to support ongoing exchange maintenance. Please contact our sales team to confirm exact compatibility and for current stock and pricing.