AIRDROID MMS SUPPORT REGISTRATION
If the registration between the 2 User Agents expires or is terminated from either side, the next time the 3CX Phone System will try to register it will generate a new rInstance value. The parameter must remain unchanged as long as the registration is active. This parameter is included in the “Contact” header and is unique for each SIP Trunk the 3CX Phone System is registered to. While doing so, 3CX includes a parameter called rInstance in the registration message sent to the UAS. A 3CX Phone System assumes the role of a UAC (User Agent Client) to register with a UAS (User Agent Server, usually a SIP Trunk provider). This allows for multiple SIP Trunks of the same provider to exist on the same 3CX installation even if all other parameters are the same between the trunks. This ensures that calls will always be routed to the correct destination since each rInstance value is unique per SIP Trunk. In short, when the 3CX Phone System receives a call, it first tries to match the rInstance value to a trunk. 3CX Phone System performs Call Source identification as described here. This is only possible for registration-based trunks since there is no registration for IP-based trunks. The 3CX Phone System uses this parameter for Call Source Identification to match an incoming call with a SIP trunk. Proxy-Authorization: Digest username="XXXX",realm="XXXX",nonce="XXXX",uri="XXXX",response="XXX",algorithm=MD5Ĭontent-Length: 0 rInstance Parameter How is it used by 3CX?
AIRDROID MMS SUPPORT UPDATE
Via: SIP/2.0/UDP 10.10.10.10:5060 branch=z9hG4bK-524287-1 rportĪllow: INVITE, ACK, CANCEL, OPTIONS, BYE, REGISTER, SUBSCRIBE, NOTIFY, REFER, INFO, MESSAGE, UPDATE Note: 3-way authentication is also supported. If then challenged by a “407 proxy authentication” or a “401 Unauthorized” message, the 3CX Phone System will respond with another registration message that includes the appropriate authentication header with all necessary information for registration. When a trunk is added, the 3CX Phone System will initiate a registration request without including authentication details. Registration based trunks are also required for implementing rinstance. Mandatory Registration-basedģCX will only support registration based trunks as those offer greater versatility and features when combined with a 3CX phone system. We explain each of these technical requirements below. These requirements can be divided into 2 categories, mandatory and optional: Mandatory Self-managed (Private cloud - On-premise)Ī SIP Trunk provider may be added to the 3CX Phone System by meeting the following technical requirements.
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