Why did my anonymous call fail?

An anonymous call can fail downstream for several reasons, including because the called party doesn't accept this call type. It's also important that the formatting of the anonymous call is correct for the industry and our network. If it's incorrect, our network may block the call.

Due to the STIR/SHAKEN requirements, you must have a valid calling number in at least the P-Asserted Identity or Remote-Party-ID headers within the SIP INVITE message when sending an anonymous call across the Bandwidth network. You should also include a Privacy header with a value set to "full" or "id" to ensure the anonymous call is properly handled. You don't need to restrict presentation of any calling number information when using a Privacy header, as it will prompt our network to do so automatically.

If you believe your anonymous calling issues are related to this formatting, please open a ticket with the Bandwidth Support Team for assistance with reviewing your calls.