The Nortel Networks DMS 250 Digital Multiplex Switching System is a high capacity toll system for specialized common carriers needing tandem switching operations.
This switch can also serve a Access Tandem (AT) function. The Traffic Operator Position System (TOPS) puts operator services into the DMS 200. Operator Centralization (OC) allows a single operator location by using the TOPS positions to transfer operator services from other DMS-200 toll centers. The Auxiliary Operator Services System (AOSS) let operator services on calls that need outside information (Such as Directory assistance).
Please refer to Data Sheet for additional specifications.
