List of telephone switches

This is intended to be a list of the more common central office (telephone company operated) telephone switches. This list is nowhere near complete. Many British and non-North American switches are missing.

AGCS

*GTD-5 EAX

Alcatel

*E10 Five
*E10B
*System 12 (formerly ITT 1240)
*System 12 Remote Switching Unit (RSU)
*OCB-283 (1000E10 Digital Family)

Automatic Electric

*32A42
*32A44
*35E97
*370A
*370B
*375A
*375B
*385A
*385B
*C1-EAX
*CXP5
*CXP5A
*EAX1
*EAX2
*EAX3
*EAX5
*ESU 3072 Line
*FW1
*GTD3-EAX (Toll switch, NOT CCS7 capable)
*GTD5 (Class 5 switch, many in use today, was the primary switch in former GTE exchanges) now supported by Lucent
*GTD5-EAX
*XPT No. 1
*SATT
*TSPS Traffic Service Position System, obsolete system for operator handled LD calls
*101 DirectorOXOOXE

Avaya

Currently Available Avaya Switches
*Communication Manager
*G600
*INDeX
*IP Office
*PARTNER ACS (Advanced Communications System)
*PARTNER Small Office Edition
*S8730

Discontinued Avaya switches (Some previously Lucent and AT&T)
*1A2 (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*MERLIN ("Classic", Originally made by AT&T)
*MERLIN PLUS ("Classic", Originally made by AT&T)
*MERLIN II ("Classic", Originally made by AT&T)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
*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)

GPO/PO/British Telecommunications

*UAX5

*UAX6

*UAX7

*UAX8

*UAX9

*UAX10

*UAX11

*UAX12

*UAX13

*UAX14

*UXE7

*UXE8

*TXE1

*TXE2

*TXE3

*TXE4

*TXE4A

*TXE4E

*TXE5

*TXE6

*System X

*System Y

CopperCom

*CSX 1100
*CSX 2100

DSC Communications Corp.

(DSC merged with Alcatel-Lucent)
*DEX 200
*DEX 400
*DEX 600
*DEX 600E
*DEX 600SC

Ericsson

*AGF
*AKE
*AR10
*ARB (telex)
*ARE11
*ARF10
*ARF102
*ARK
*ARM20
*ARM 202
*ATE
*ATE-NB
*ATE-VB
*AXE 10
**AXE 10 Remote
**AXE Local 7
**AXE Transgate
*AXE810
*MD110
*MX-ONE
*Rurax

Fujitsu

*C140
*C460
*FETEX 100
*FETEX 150
**FETEX 150 Local
**FETEX 150 Toll

GEC

later Marconi (Britain)
*SE50 (4000-type in GPO-speak)

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
*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)

Leich

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

Marconi (was GEC)

*System X

MetaSwitch

*VP2510
*VP3510
*CA9020
*MG3510

Mitel

*SX200
*SX2000
*GX5000L
*GX5000S
*3300 mxe

Motorola

(these are MTSO Cellular switches)
*EMX2500
*EMX4
*EMX5000

NEC

*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 sxs based on license from Western Electric)M100

Nokia

*DX200
**DX220
**DX220 Compact

North Electric (Galion, Ohio)

*CX (CX evolved from the "Automanual" system designed by Edward Clements "Clement eXchange")
**CX30 30 line
**CX60 60 line
**CX100 100 line
**CX200 "broadspan" up to 200 lines)
**CX1000 large CX expandable to 10,000 lines!
*DSS1 (North's first digital switch for local exchanges)
*DSS2
*ETS4 (Large #4A-ETS class toll switch based on Ericsson "code switch")
*NTS4E 4-wire toll switch with Xbar switches an "Omni" processor(s)
*NX1 Family NX1A, B, C & D; All based on Ericsson By-Path Crossbar license)
**NX1D (Final production version)
**NX1E (NX-1D with OMNI Processor for trunk and number-group translation services)
*NX2 Family Small 90 - 1800 line CDO Xbar
**NX2 Original design
**NX2A (improved cabinets)
**UN2 (United Telecom version of NX-2A)
**Switcher (NX-2A in a trailer for portable/emergency use)
***TSW
***TSW2
***TSW3
*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 (formerly Nortel Networks, then Northern Electric Limited (Canada) then Northern Telecom / Nortel)

*Business Communications Manager
**BCM200
**BCM400
**BCM50
* Communication Servers
**Communication Server 1000 (22,500 lines 3200 trunks TDM and VoIP)
**Communication Server 1500 (48,000 lines 8,400 trunks TDM and VoIP)
**Communication Server 2000 Compact
**Communication Server 2000 (180,000 lines 200,000 trunks TDM and VoIP)
**Communication Server 2100 (200,000 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

*DMS-10 (First "production" class 5 digital switch installed in public telephone network)
**DMS-10 Carrier Class Switching System (320 ISDN PRI links or more than 20,000 lines)
**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 <640 lines)
**DMS-10M (prepackaged DMS-10, a CDO in a "box")
*DMS-100 FAMILY of Digital Exchanges
**DMS-100 (large local digital Class 5) also previously known as an SL-100 when used for Centrex 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 (combo Carrier/International Gateway 70,000 to 100,000 trunks)
**DMS-500 (Local/Toll + CLEC Switch)
**DMS-Global Services Platform (
**DMS-MTX (Cellular MTSO)
*SP1 (Electronic Stored Program Control using mini-bar switches)
**SP1 2-Wire (Local)
**SP1 4-Wire (Toll)
**SP1E (used NT40 processor)
*NE-1ESS (Northern Electric version of Western Electric #1ESS {licensee})
*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)

Philips

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

REDCOM Labs

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

Siemens

*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
*EWSD
**Remote Switch Unit RSU-DE3
**Remote Switch Unit RSU-DE4
**Remote Switch Unit RSU-DE5
*RCUB-800C
*DCO-CS (Formerly Stromberg Carlson DCO)
*HiQ8000

Sonus

*GSX9000
*GSX4000
*PSX6000EMS 12000Topcom 601Topcom 200Hicom 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 (#5xbar licensed from Northern Electric (Canada) for US sales/distribution )
* Motorswitch - Siemens (Germany)
*XY (Stromberg version of Ericsson "flat motion" switch operated in horizontal planes)

Actually 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 Ped mount cab 1000 lines in a subdivision - required multi T-1's to host
*****RLS 4000 same thing 4000 lines
*****RLS 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

* Coral II
* Coral III
* Coral ICE

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)

Vidar

*IMA2
*ITS 4
*ITS 4/5
*ITS 5

Western Electric / AT&T Technologies / Lucent

Step-by-Step / Strowger

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

=Panel=

*Local Panel
*Panel Tandem
**Battery cut-off (BCO)
**Ground cut-off (GCO)

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

*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)

Digital Switching System

*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)
*PacketStar PSAX1000/1250/2300/4500
*Plexus/Lucent Gateway Platform/Lucent Compact Switch (formerly Telica Plexus 9000)
*CSD