When a caller from the PSTN calls an IP phone which is configured to forward the call to another PSTN number the caller gets a fast-busy. Can anyone explain why and is there a workaround to get the call routed to the PSTN.
Thanks for taking the time to answer my question, we have found the problem to be a voice translation rule which added digits on the caller information which seemed to be rejected by the local telco switch.
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