- 3CX®
- AGFEO® ES 516
- Alcatel-Lucent® OmniPCX® Enterprise
- Alcatel-Lucent® OmniPCX® Office
- Auerswald® COMpact 5010 VoIP
- AVM® FRITZ!Box® 7590
- bintec-elmeg® be.IP plus
- CentrexX from Deutsche Telefon Standard® GmbH cloud PBX
- Cisco® Call Manager (CUCM)
- Crown Centrex from Gamma Communications GmbH cloud PBX
- Cybergate/ CyberTwice with Microsoft® Teams®
- ecotel® cloud.phone®
- easybell® cloud PBX
- equada® HostedPBX cloud PBX
- Genetec Sipelia™
- innovaphone® IPVA
- innovaphone® Cloud
- LANCOM® 1784VA
- innovaphone® Cloud system
- Linphone® Free SIP Service
- LTE/GSM Gateway
- Microsoft® Teams®
- nfon® Cloud system
- PASCOM® cloud PBX
- peoplefone® cloud PBX
- reventix cloud PBX
- RingCentral® Cloud system
- Starface® Compact SIP v2
- Swisscom®
- Telekom Deutschland® Cloud PBX
- Unify® Office
- Vodia® HostedPBX
- Webex by Cisco® with T-Systems®