3CX [API] 3CX [plug-in] AT&T Office@Hand Alcatel Lucent Rainbow Ascend Asterisk Avaya Avaya Cloud Office Axeos BT Cloud Work Bellen met Lotte Bellen met Raf BlackGATE Broadsoft BudgetPhone CC4ALL Callto365 Cisco Call Manager ClearVox Nexxt Cloud Communications Commflow Compass Contact by Summa Dialpad Elevate UC Enreach Contact Enreach UP FreePBX Gamma Communications ISTRA ™ Intermedia KAZOO KPN EEN Kwebbl Maf Managed Voice 3 / Coligo Microsoft Teams Miralix Mitel Cloudlink Mitel OIG MobeX NetSapiens OneUC Petit HPBX PortaOne ROGER365 RingCentral RoutIT SIPserver SYSCONFIG Saicom Sippy T-Mobile Cloud&Clear TELUS Business Connect Talk REX Telavox Telepo Tinkle Tring UCBee UCXpress Unify Office Unify OpenScape Business Univerge Blue Connect VIP VoIP VOIPZeker Verizon Voclarion Vodafone Business UC Vodafone One Net VoiceHost Voiceworks Voip4all VoipNow Voipplay Voys Voys Partners Webex Webex Embedded Wildix X2com Xelion Yeastar ipnordic sipVine