Knowledgebase ProCall Enterprise Current: Communication relations in softphone and AV operation Communication relations in softphone and AV operation Update statusMarch 2026Product relevanceProCall 8 Enterpriseestos ProCall 7 Enterprise (End-of-Life)To illustrate how involved components work together in SIP softphone and audio/video operation, the diagrams provide a quick overview.In order to be able to ensure operation across network boundaries, rules for consideration on routers or firewalls are listed as required. Audio/video chat between ProCall Enterprise clients for Windows Push notification service SIP call between ProCall App for Web in the external network and an internal or external telephone SIP call between ProCall App for Web and ProCall Enterprise Client for Windows within a LAN SIP calls between ProCall mobile app in the cellular data network and an internal or external phone SIP calls between two ProCall Enterprise softphone clients for Windows within a LAN Audio/video chat between ProCall Desktop for Windows and ProCall Mobile Audio/video chat between ProCall Desktops for Windows (LAN and VPN-free) SIP Call zwischen ProCall Desktop for Windows und einem internen oder externen Telefon