Nortel NT8X99AB (OPTera Metro / PDH-SDH / Passport-MSS / networking portfolio) Telecom System Card / Module

The Nortel NT8X99AB is an ISDN LCME power converter, supplying regulated DC power to the ISDN Line Concentrating Module Enhanced (LCME) peripheral shelf on Nortel’s DMS-100/DMS-100E central-office switching platform. The LCME shelf terminates ISDN basic-rate subscriber lines and hands calls to the DMS-100 switch fabric, and this converter is the shelf’s dedicated power-conversion card, feeding the shelf’s line and control circuits from the office’s DC power plant. DMS-100 central-office switches remain in service in many established telecoms networks worldwide, and genuine spares such as this one are a routine requirement for restoring shelf redundancy after a component failure or bringing an additional LCME shelf into service. Confirm the exact shelf generation and power-plant voltage against your installation before ordering. Tech-Star (UK-based, shipped worldwide) supplies Nortel hardware for central-office maintenance and expansion. Get in touch for current stock and pricing.