List of Telephone Switches - Nortel

Nortel

  • Application Server 5300 (AS5300)
  • Business Communications Manager (BCM)
    • BCM50
    • BCM200
    • BCM400
    • BCM450
  • Nortel Norstar Key Systems
    • 616
    • 824 Modular
    • Norstar CCIS
    • Norstar MCIS
  • Nortel Meridian 1 PBX
    • Option 11
    • Option 21
    • Option 51
    • Option 61
    • Option 81
  • Communication Servers (CS Systems)
    • CS1000 (22,500 lines 3200 trunks TDM and VoIP)
    • CS1500 (48,000 lines 8,400 trunks TDM and VoIP)
    • CS2000 Compact
    • CS2000 (180,000 lines 200,000 trunks TDM and VoIP)
    • CS2100 (230,000 ports, 125,000 IP phones, 150,000 analog telephones, 125,000 digital telephones, 200,000 IP trunks, 50,025 digital trunks, 32,000 analog trunks, 200,000 SS7 trunks, 4,093 H.323 gateways, 112,000 nodes per host, 99,999 ACD agents)
  • Digital Multiplex System (DMS)
    • DMS-10 Carrier Class Switching System (320 ISDN PRI links or more than 20,000 lines) (First "production" class 5 digital switch installed in the North American public telephone network)
    • DMS-10 RLCM (640 line remote)
    • DMS-10 RSLE (520 line remote)
    • DMS-10 RSLM (640 line remote)
    • DMS-10S (super small DMS-10 for very small exchanges, less than 640 lines)
    • DMS-10M (prepackaged DMS-10, a Community Dial Office in a pre-packaged container/"box")
  • DMS-100 FAMILY of Digital Exchanges
    • DMS-100 (large local digital Class 5) (also known as an SL-100 when used as CPE (Customer Provided Equipment or PBX service)
    • DMS-100/200 (local/toll digital more than 135,000 lines)
    • DMS-200 (toll digital)
    • DMS-250 (Equal Access Carrier Switch-digital)
    • DMS-300 (International Gateway Switch-digital)
    • DMS-300/250 (combination Carrier/International Gateway 70,000 to 100,000 trunks)
    • DMS-500 (Local/Toll + CLEC Switch)
    • DMS-Global Services Platform
    • DMS-MTX (Cellular MTSO)
  • Stored Program (SP) (Electronic Stored Program Control using mini-bar switches)
    • SP1 2-Wire (Local)
      • The SP1 processor was constructed using Small Scale Integration (SSI) Diode Transistor (DTL) Logic. Two types of memory was used. Processor read/write scratch memory (called CALL STORE) was implemented using a magnetic core variant called Ferrite Sheet. Program and Data Store (used to store Software and infrequently changed data) was implemented using a technology called piggy back twistor - in modern parlance a write once, read many times non-volatile memory system). As was the case with the #1ESS systems, processors and memory were duplicated with automatic comparison of processing results and automatic recovery in the event that a mismatch was discovered. It did not however support the complex recovery mechanism provided in the #1ESS where a processor from one half of the complex could be connected to a mix of memory (both call store and program store) modules from both halves of the complex in order to achieve a working combination. Processor diagnostics would generally narrow a problem down to a board or three.
      • A SP1 2-wire variant was also available that provided Centrex services.
      • A version of the SP-1 ESS that could provide both 2 & 4 wire services was also built. The first instance was installed in Vegreville Alberta in 1976 or 1977.
    • SP1 4-Wire (Toll)
      • The first example of this switch was installed for Bell Canada, in Thunder Bay, Ontario in late 1973. It provided toll services for North Western Ontario and CAMA (Centralized Message Accounting) for the City of Thunder Bay. The City of Thunder Bay which operated its own Telephone Company installed a number of 2W SP1s.
    • SP1E (used NT40 processor which was later the first processor system for the DMS-100 Family of switches)
  • NE-1ESS (Northern Electric version of Western Electric) #1ESS {licensee})
    • Bell Canada operated NE-1ESS 2 wire switches (some of which also provided Centrex services) in Toronto, Ottawa and Montreal. A 4W NE-1ESS was installed in Thunder Bay to provide telephone switching services (SAGE and AUTOVON)for USA and Canadian bases in that part of North America. The #1ESS was implemented using discrete diode transistor logic. A typical circuit board would implement a single 4 input "NAND" gate. Of the myriad of cards in the system - many were dedicated diagnostic gates. The diagnostic software had a very high (95% +) success rate identifying a single failing card. The success rate dropped quickly thereafter. Drifting Voltage Regulator cards caused a lot of angst.
  • NE-4A (Northern Electric version of Western Electric) 4A toll {licensee})
  • NE-5XB (Northern Electric version of Western Electric) #5Xbar {licensee})
  • SA1 (Small Northern designed crossbar CDO)
  • SA2 (Small Northern designed crossbar CDO)
  • SF1 (Small Northern designed crossbar CDO)
      • Norstar

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