Nortel NT9X53AD (OPTera Metro / PDH-SDH / Passport-MSS / networking portfolio) Telecom System Card / Module

The Nortel NT9X53AD is a DMS-100E System Clock (SYS CLOCK) card, the timing-reference module used in the DMS SuperNode generation of Nortel’s DMS-100E digital central-office switch. It generates and distributes the master clock signal that keeps every peripheral shelf and network module in the office synchronised, a function essential to correct call switching and to the office’s interworking with the wider digital telephone network. DMS-100E offices of this generation remain in service at telephone operators worldwide, and genuine spares like this restore full timing capacity after a card failure, usually as part of a duplicated clock pair for redundancy. Specifiers should confirm exact frame and generic-program-load compatibility before ordering. Tech-Star is UK-based and ships worldwide. Contact our sales team for current availability and pricing.