Interexchange Carriers
- Allstream (formerly AT&T Canada)
- AT&T
- AUCS
- Bell South
- BT (British Telecommunications)
- Cable & Wireless
- Cable & Wireless Optus
- Energis
- France Telecom
- Jazztel
- MCI WorldCom
- Sprint Telecommunications
- Stentor
- Telecom New Zealand
ACD/PBX Providers
- Alcatel (Omni PCX 4400)
- Aspect Telecommunications (CallCenter)
- Avaya (Definity ECS)
- Cisco Systems Cisco CallManager/IP Contact Center Solution
- Ericsson (MD110, ACP1000)
- NEC (NEAX 2400/7400 and APEX 7600)
- Nortel Networks (DMS-100/500, SL-100, Meridian1, Symposium
- Rockwell (Galaxy, Spectrum)
- Siemens (HICOM 300/E, Rolm 9751 CBX)
Partner Provided Interfaces
IVR/VRU Providers
- Aumtech
- Apex Voice
- Broad Daylight
- Edify (Electronic Workforce)
- Epos
- iBasis
- Intervoice-Brite
- Lucent (Conversant)
- Periphonics (VPS/iS)
- Sonexis Software
- Spanlink
- Syntellect
- Telera
- Tellme Networks
- Varetis
- Virtual Hold
CRM
- Call Center Technologies
- Chordiant
- Cicero Technologies
- Graham Technologies
- Kana/Silknet
- E.piphany (recently acquired Octane)
- Oracle
- Pegasystems
- Siebel
Workforce Automation
Recorders
VoIP
Dialers
Wallboards