List of telephone switches

This is an incomplete list of central office (telephone company operated) telephone switches.

AGCS

See Automatic Electric

American Digital Switching

• Centura 2000

Alcatel

See also Lucent

• E10 FIVE
• E10MT
• E10B
• System 12 (formerly ITT 1240)
• System 12 Remote Switching Unit (RSU)
• OCB-283 (1000E10 Digital Family)
• OmniPCX Office
• OmniPCX Enterprise

Thomson

• MT-20
• MT-25
• MT-35

Automatic Electric

• 32A42
• 32A44
• 35E97
• 370A
• 370B
• 375A
• 375B
• 385A
• 385B
• C1-EAX
• CXP5
• CXP5A
• EAX1
• EAX2
• EAX3
• ESU 3072 Line
• FW1
• GTD-3 EAX (Toll switch, NOT CCS7 capable)
• GTD-5 EAX (Class 5 switch, many in use today, was the primary switch in former GTE exchanges. Now supported by Lucent.)
• XPT No. 1
• SATT(Strowger Automatic Toll Ticketing, relay and type 45 rotary switch mechanics).
• Strowger Step-by-Step (Strowger patents were exclusively licensed to the Automatic Electric Company).
• TSPS (Traffic Service Position System, obsolete system for operator handled LD calls.)
• 101 Director
• OXO
• OXE

Avaya

• Currently Available Avaya Switches
  • Application Server 5300 (AS5300)
  • Communication Manager
  • S8800
  • S8730
  • S8510
  • S8400
  • S8300D
  • INDeX
  • IP Office
  • PARTNER ACS (Advanced Communications System)
  • PARTNER Small Office Edition

• Discontinued Avaya Switches
  • 1A2 Key System (Electro-mechanical Key System made by Western Electric)
  • DEFINITY BCS (Business Communications System)
  • DEFINITY ECS (Enterprise Communications Server)
  • DEFINITY G3R (Rack)
  • DEFINITY Communications System Generic 2 (Formerly, System 85)
  • DEFINITY Communications System Generic 3 (Formerly System 75)
  • DIMENSION (Previously made by AT&T)
  • G3MCC (Multi-Carrier Cabinet)
  • HORIZON (Previously made by AT&T)
  • MERLIN ("Classic", Originally made by AT&T)
  • MERLIN PLUS ("Classic", Originally made by AT&T)
  • MERLIN II ("Classic", Originally made by AT&T)
  • MERLIN LEGEND
  • MERLIN MAGIX, Integrated Communications System
  • PARTNER
  • PARTNER II
  • PARTNER PLUS
  • S8700 & S8720
  • S8500
  • S8300 a,b & c
  • SPIRIT
  • System 25 (Previously made by AT&T)
  • System 75 (Previously made by AT&T)
  • System 75 XE (Previously made by AT&T)
  • System 85 (Previously made by AT&T)

BPL Telecom

• Sigma Indx-100
• Sigma Indx-150
• Sigma Indx-250
• Sigma Indx-2000

GPO/PO/British Telecommunications

• TXS
• IAX5 Island Automatic eXchange No 5
• UAX5
• UAX6
• UAX7
• UAX8
• UAX9
• UAX10
• UAX11
• UAX12
• UAX13
• UAX14
• UXE7
• UXE8
• TXK1
• TXK5
• TXE1
• TXE2
• TXE3
• TXE4
• TXE4A
• TXE4E
• TXE5
• TXE6
• System X
• System Y (Ericsson AXE)
• UXD5

C-DOT

• AN RAX
• MAX
• RAX
• TAX

CopperCom

• CSX 1100
• CSX 2100

CORAL Telecom

• IRIS IVDX
• IRIS Lite
• IRIS NGX
• DX-2000
• SBDX

Datang Telecom

• SP30

DGT

• DGT3450

Daewoo

• DTS-1100
• DTS-3100
• DTS-4000

DIAX

• Dikon ISDN switch

Digium

The Asterisk PBX is not exactly a phone exchange per se, but a software implementation of a PBX that runs on a PC, using the computer's network interface to handle voice over IP, and PCI cards sold by Digium to connect to the phone network.

• Asterisk PBX

DSC Communications Corp.

DSC merged with Alcatel-Lucent

• DEX 200
• DEX 400
• DEX 600
• DEX 600E
• DEX 600SC

Electronics and Telecommunications Research Institute (Korea)

The TDX switch was a joint project with Korea Telecom and four manufacturers, LG Electronics, Samsung Telecommunications, Daewoo Telecom and Hanwha Telecom.

• TDX-1
• TDX-10
• TDX-100

Ericsson

• AGF
• AKE
• AR10
• ARB (telex)
• ARE11
• ARE13
• ARF10
• ARF101
• ARF102
• ARK-D (decadic signalling)
• ARK-M (mfc signalling)
• ARK523 (small minor switching centre)
• ARM20
• ARM50
• ARM 201
• ARM202
• ATE
• ATE-NB
• ATE-VB
• AXE 10
  • AXE 10 Remote
  • AXE Local 7
  • AXE Transgate
• AXE810
• MD110
• MX-ONE
• Rurax

Excel Switching

• EXS 1000
• EXS 2000
• EXS 4000
• EXS 8000
• EXS 16000
• EXS 30000
• LNX 1000

Fujitsu

• C140
• C460
• Focus I
• Focus II
• Focus III
• Focus 50
• Focus 100
• Focus 196
• Focus 960
• Focus Elite
• FETEX 100
• FETEX 150
  • FETEX 150 Local
  • FETEX 150 Toll
• Essence 630
• Essence 650
• 9600 Series
  • 9600VS
  • 9600S
  • 9600M
  • 9600L
• Coral (branded as Fujitsu in Australia/New Zealand 1996-2002, manufactured by Tadiran Telecom)
  • Coral FlexiCom 200 (formerly Coral SL, discontinued)
  • Coral FlexiCom 300 (formerly Coral I, discontinued)
  • Coral FlexiCom 400 (formerly Coral II)
  • Coral FlexiCom 5000 (formerly Coral III)
  • Coral FlexiCom 6000 (formerly Coral III)
  • Coral IPx Office
  • Coral IPx 500
  • Coral IPx 800
  • Coral IPx 3000
  • Coral IPx 4000

Great Dragon Telecom (GDT)

• HJD04

GEC

GEC later became Marconi (Britain)

• SE50 (4000-type in GPO naming)

Hitachi

• EX10
• HDX-10
• DX
• DX30
• DX40
• MDX
• HCX5000

Huawei

• C&C08

Hyundai Electronics Industries

• HDX-300
• HDX-2000

Indian Telephone Industries Limited

• ESAX 200
• ILT-512
• ILT-2048
• MILT-64

Inventel

• ACT6000

Iskratel

• SI2000
• SI3000

it:Italtel

• CT1
• CT2
• CIMA
• UT10
• UT20
• TN16
• UT100
• iMSS (Italtel Multi Service Solution), a.k.a. i-SSW

ITT Corporation (Includes ITT-Kellogg)

• 1210 (originally North Electric DSS)
• 1240
• TCS5
• TCS2
• TE500A
• TE400H
• TE400
• TD100
• Kellex
• 7J
• 7X2
• 7X3
• 7XB
• A1
• A1-SPC
• CRX
• CSX
• K60 (ITT-Kellogg)
• K7 (ITT-Kellogg)
• K1040
• PC32B
• Relaymatic (ITT-Kellogg)
• TCS5
• TRS4
• AN/TTC-22 100 Line Automatic/Manual Military Tactical Switch (retired)

ITT (Europe)

• 7A, 7A1, 7A2, 7E (Rotary 'machine switching' system)
• 7D (Rotary, for smaller/rural areas)
• Pentaconta (crossbar)
• Metaconta (SPC electronic)

JS Telecom

(Later Bosch Telecom)

• JISCOS 8005
• JISCOS 8007

KAREL

• DS200

Kvant-Intercom

• Kvant (Квант)
• Kvant-E (Квант-Е)

KD

• XE30

Leich

• All Relay
• CS100
• CS200
• CX 2
• CX 6
• CX 90
• LXP-3
• LXP-4

LG Electronics

• STAREX-TX1
• STAREX-VK (VKX Ltd, Vietnam)

LONIIS

• http://loniis.ru/products/atsc-90.pdf</ref>

Marconi (was GEC)

• System X

MetaSwitch

• VP2510
• VP3510
• CA9020
• MG2510
• MG3510

Mitel

• SX5
• SX10
• SX20
• SX50
• SX200
• SX200D
• SX200 Light
• SX200ML/EL/ELx
• SX200ICP
• SX2000SG
• SX2000S
• SX2000 Light
• 3300ICP
• 3300MCD
• GX5000L
• GX5000S
• 5000 Communications Platform

Motorola

These are Mobile Telephone Switching Office Cellular switches

• EMX2500
• EMX4
• EMX5000

NEC

• Aspire
• Topaz
• C410
• C460
• NC10
• NC23
• NC23SE
• NC230
• NC460
• NA820
• NCA20
• NCX23
• ND10A
• ND10B
• ND20A
• ND20B
• ND20S
• NEAX-61 (K, L, M & S)
• NEAX-61E
  • NEAX-61E Remote
• NESXS (Nippon Electric step-by-step based on license from Western Electric)
• M100
• NEAX31 (Discrete Electronic CPU, 4-stage Crossbar switching fabric, PBX)
• NEAX22 (Analog / Digital hybrid PBX)
• NEAX 2000/1000
• NEAX2400 (Fully Digital PBX)
• XN120
• NEC Univerge SL1000 (Small or Medium Sized, VoIP And TDM)

• Enterprise IP Systems
  • NEC Univerge SV7000 (Fully IP, VoIP and TDM) Pure IP Communication server
  • NEC Univerge SV8100 (Fully IP, VoIP and TDM)
  • NEC Univerge SV8300 (Fully IP, VoIP and TDM) Pure IP Communication server
  • NEC Univerge SV8500 (Fully IP, VoIP and TDM) Pure IP Communication server

Nika (Ukraine)

• ATSK50/200
• ATSK100/2000

Nokia

• DX 200
  • DX 220
  • DX 220 Compact
  • IPA 2800

North Electric (Galion, Ohio)

• CX "All-Relay Exchanges:

(CX evolved from the "Automanual" system designed by Edward Clements "Clement eXchange" or "Community eXchange")

• • CX30 (30 line)
  • CX60 (60 line)
  • CX100 (100 line)
  • CX200 ("broadspan" up to 200 lines)
  • CX1000 (large CX expandable to 10,000 lines)
• MCX A version of the CX product line designed by F.R. McBerty after leaving Western Electric/Bell Labs and becoming President of North Electric.

The McBerty design used an early "wire spring" relay and welded piano wire interconnections rather than complex wire multiples. The system never achieved the reputation of the CX product due to problems with poor contact pressure in the interconnection relays. Despite its much lower cost of production and installation, the level of maintenance required to keep these systems on good order doomed this variation of the CX design.

• DSS1 (North's first digital switch for local exchanges)

This later was renamed the ITT 1210 product upon purchase of North electric by ITT.

• DSS2
• ETS4 (Large #4A-ETS class toll switch based on Ericsson "code switch")
• NTS4E (4-wire toll switch with Xbar switches and "Omni" processors)
• NX1 (Family NX1A, B, C & D; All based on Ericsson By-Path Crossbar license)

L.M. Ericsson purchased North Electric in the early 1950s and brought this Swedish design to North where it was reworked to conform to U.S. telecommunications requirements.

• • NX1D (Final production version)
  • NX1E (NX-1D with OMNI Processor for line/directory, trunk and number-group translation services)

The NX-1E was not a SPC switch, rather it was a conventional path controlled switching matrix with electronic processors (computers) replacing the control, route selection and translation (directory number to line ID) functions.

• NX2 (Family Small 90–1800 line CDO Xbar)
  • NX2 (Original design 1959-60)
  • NX2A (Improved cabinets ~1962)
  • UN2 Electrically and mechanically the same as the NX-2A but with design modifications specified by United Telecom (United Telecom/Sprint/Embarq) when they acquired North from L.M. Ericsson in the early 1960s. The "United" version of NX-2A replaced the intercabling connection blocks with wire wrap connections so that switches could be installed or expanded without having custom cable harnesses provided by North Electric.
  • Switcher Family (NX-2A pre-installed in a trailer for rapid installation or portable/emergency use)
    • TSW Basic Unit with growth to ~360 lines
    • TSW2 Expanded unit with growth to ~1200 lines
    • TSW3 Jumbo unit with growth to system recommended maximums
• TSD (toll switch)
• AN/TTC-20 568 Line Military Fixed Switch (Used by US Air Force - only one was known in existence at Sembach AB, Germany) (retired)
• AN/TTC-30 568 Line Military Tactical Mobile Switch (Used by US Army and Air Force) (retired)

Nortel

• Application Server 5300 (AS5300)
• Business Communications Manager (BCM)
  • BCM50
  • BCM200
  • BCM400
  • BCM450
• 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{fact})
  • 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)
    

    

    A Nortel DMS-100e used by an operator to offer local and long distance services in France
  • 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}^{[citation needed]})
  • 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}^{[citation needed]})
• NE-5XB (Northern Electric version of Western Electric) #5Xbar {licensee}^{[citation needed]})
• SA1 (Small Northern designed crossbar CDO)
• SA2 (Small Northern designed crossbar CDO)
• SF1 (Small Northern designed crossbar CDO)

Nortel Netaş (Turkey)

• Elif I
• Elif I I
• DRX-4

NTT

• D60
• D70

Oki

• Discovery I PBX
• Discovery II PBX
• Discovery III PBX
• Discovery 8000 PBX
• D10
• D60
• D70
• KB270

Philips

• UR
• UR NB
• UR49
• URVB
• UV
• PRX/A
• PRX/D

Spetstroy-Svyaz

• Proton-SSS

Pupin Telecom

• DKTS 20
• DKTS 30

REDCOM Labs

• TRANSip
• SLICE
• HDX
• IGX-A
• IGX-MT
• IGX-N
• MDX 10K
• MDX 384 modular exchange "stackable" to 384 lines/trunks

Samsung Telecommunications

• S-1240
• SDX-100
• SDX-200
• SDX-RB
• TDX-1
• TDX-1B
• TDX-10

Siemens

• SD50 PBX
• SD192MX PBX
• SD232 PBX
• Saturn I PBX
• Saturn II PBX
• Saturn IIE PBX
• Saturn III PBX
• No. 16 Step-by-Step
• No. 17 Step-by-Step
• No. 51 Step-by-Step
• EDX-P
• EMD55
• EMD56
• EMD57
• ESK - CP24
• ESK - CP44
• ESK - CP44A
• ESK 10000 E
• EWSD
  • Remote Switch Unit RSU-DE3
  • Remote Switch Unit RSU-DE4
  • Remote Switch Unit RSU-DE5
• RCUB-800C
• DCO-CS (Formerly Stromberg Carlson DCO) - Sold to Genband in 2006
• HiQ8000
• SPX2000 (Formerly Equitel)

Sonus

• GSX9000
• GSX4000
• PSX6000
• EMS 12000
• Topcom 601
• Topcom 200
• Hicom 300

Stromberg-Carlson

• DCO 21
• DCO 80
• DCO 200
• DCO 360
• Century DCO6000
  • DCO Remote Line Switch 1000 (RLS 1000)
  • DCO Remote Line Switch 4000 (RLS 4000)
  • RLS 450
• DCO-SE
• DTM
• ESC-1 "Crossreed" electronic exchange
  • ESC-3
• MS30
• SC#5 (#5 Crossbar licensed from Northern Electric (Canada) for US sales/distribution)
• Motorswitch - Siemens (Germany)
• XY (Stromberg version of Ericsson "flat motion" switch operated in horizontal planes)

The DCO family starts as generic DCO

• DCO
  • DCO-E (Line Switch 10,000 lines)
  • DCO-SE (Line Switch 10,000 lines, software enhanced, class features, centrex, etc.)
    • DCO-RLS (Remote Line Switch, controlled by hosts above)
      • RLS 1000 (Pedestal mount cabinet 1000 lines in a subdivision - required multiple T-1's to host)
      • RLS 4000 (Same thing, but 4000 lines)
      • RLS (This has the ability in a host outage to make intra-cabinet calls)
      • The line switches will also talk to AT&T SLC-96 pedestals - 96 lines on a ped
  • DCO-CS (Long distance, very limited lines - 1+ trunking to long distance all T-1 cards)

Note: DCO systems are now supported by GENBAND

Tadiran Telecom

• Coral FlexiCom 200 (formerly Coral SL, discontinued)
• Coral FlexiCom 300 (formerly Coral I, discontinued)
• Coral FlexiCom 400 (formerly Coral II)
• Coral FlexiCom 5000 (formerly Coral III)
• Coral FlexiCom 6000 (formerly Coral III)
• Coral IPx Office
• Coral IPx 500
• Coral IPx 800
• Coral IPx 3000
• Coral IPx 4000
• Coral ICE
• Coral Sea Soft Switch

Telesis A.S.

• Telesis X1

Telrad

• TMX-10
• TMX-100

TEMCCO (Iran)

• National Digital Switch (B-NDS)
• TEM X1000
• TEM X256

Tesla

Step-by-Step

• P51

Crossbar switch

• PK 201
• PK 202

Tekelec

• Tekelec 9000 Distributed Switching Solution (formerly SanteraOne)
• Tekelec 7000 Class 5 Packet Switch (formerly Taqua Open Compact Exchange)

Tropico

• Tropico C (Subscriber Line Digital Concentrator)
• Tropico R (Small Capacity Local/Tandem Exchange)
• Tropico RA (Local/Transit Exchange)

VEB Kombinat Nachrichtenelektronik

• DVZ 2000 (space-division digital switch)
• ENSAD (time-division digital switch)
• OZ 100 D (96-line time-division digital switch)

Veraz Networks

• Control Switch 5.8

VESNET

• DRX-4

Vidar

• IMA2
• ITS 4
• ITS 4/5
• ITS 5

Western Electric / AT&T Technologies / Lucent

Panel

• Local Panel
  • Battery cut-off (BCO)
  • Ground cut-off (GCO)
• Panel Tandem
  • Panel Sender Tandem
  • Office Select Tandem

Step-by-Step / Strowger

• No. 1
• No. 350A
• No. 355A CDO (Community Dial Office)
• No. 356A
• No. 360A

Crossbar switch

• Crossbar Tandem
• No. 1 Crossbar
• No. 3 Crossbar
  • No. 3 Crossbar 2-Wire
  • No. 3 Crossbar 4-Wire
• No. 4 Crossbar
  • No. 4A/CTS Crossbar (Card Translator System)
  • No. 4A/ETS Crossbar (Electronic Translator System)
  • No. 4M Crossbar
  • No. 4M ETS Crossbar
• No. 5 Crossbar
  • No. 5 Crossbar 2-Wire
  • No. 5 Crossbar 4-Wire
  • No. 5 ETS Crossbar
  • No. 5A Crossbar

Electronic Switching System SPC

• ESS (Experimental system installed in Morris, Illinois. In operation November 1960–?. This switch was never given a name other than "Morris ESS".)
• No. 101 ESS
• No. 1 ESS (1ESS)
  • No. 1 ESS 2-Wire
  • No. 1 ESS 4-Wire
• No. 1A ESS
• No. 2 ESS (2ESS)
  • No. 2A ESS
  • No. 2B ESS
  • No. 2C ESS
• No. 3 ESS (3ESS)

Electronic Switching System TDM

• No. 4 ESS (4ESS)
• No. 5 ESS (5ESS)
  • No. 5 ESS CDX (Compact Digital Exchange)
  • No. 5 ESS-2000 VCDX (Very Compact Digital Exchange)
  • No. 5 ESS-2000 VCDX Remote
  • No. 5A RMS (Remote Switching Module)
  • No. 5B RMS (Remote Switching Module)
  • No. 5E XC (Extended Capabilities)
• No. 7 R/E (Revolutionary/Evolutionary)
• No. 10A Remote Switching System (10A RSS)

Other digital switches

• BZ5000 (formerly Batik Elcom 4KT from Batik/Zetax, Brazil)
• CSD
• iGen
• PacketStar PSAX1000/1250/2300/4500
• Plexus/Lucent Gateway Platform/Lucent Compact Switch (formerly Telica Plexus 9000)
• Zetax ZTX610

USSR manufacturers

• AMTS-1M
• AMTS-2
• AMTS-3
• Кварц (Quartz)
• M-10C
• ATS-47
• ATS-54
• ATS-K
• ATS-K4
• ATSK-U

ZTE

• ZX500
• ZXJ10
• ZXJ2000

Experimental and canceled switches

• Lynch LCS
• Mitel CX5000
• Collins Radio Corp. DTS