Calling & routing
Trunks, dialog routing and deterministic call behavior.
Browse articles →Knowledge base
Resolve the symptom. Understand the cause.
Practical articles written around real call paths, observable evidence and safe recovery, not lists of unexplained settings.
FIELD GUIDE · 1.0
Follow one call from INVITE to final BYE.
Read signaling, route decisions, media negotiation and hangup causes as a single session before changing configuration.
Read the guide →00.000SIPINVITE +48221002400
00.014FLOWDID → Business hours
00.093SIP183 Session Progress
08.417SIP200 OK · Agent 204
42.210SIPBYE · normal clearing
Popular fixes
Start with the evidence you have.
01
Calls connect but audio is missingAudio, NAT & WebRTC
8 min→02Remote hangup does not end both call legsCalling & routing
6 min→03Validate a SIP trunk before productionCalling & routing
12 min→04Restore a backup into a clean installationOperations & recovery
15 min→05Understand a call-flow traceOperations & recovery
7 min→06Prepare an emergency locationSecurity & tenancy
10 min→Browse by collection
Audio, NAT & WebRTC
RTP paths, ICE, TURN, codecs and browser calling.
Browse articles →Operations & recovery
Diagnostics, backups, restore and call-flow evidence.
Browse articles →Security & tenancy
Emergency identity, locations and safe routing.
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