Introduction & Applies To

Call2Teams - Customers/Partners

Inbound calls are failing because the Source IP does not match expected address.

Issue and Symptoms

Inbound calls fail to be delivered.

Maybe indicated by a 603 decline error and/or a Q850 Reason code: 102


Source IP is not recognised. Most likely related to PBX's where there is no registration and Source IPs must be provided.

Steps to Resolve

Add the source IP shown in the errant call, to the Source IPs listed in the PBX Configuration Page.

See also: Configuring a Trunk/PBX Service


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