I had some termination issues with random cell phone carriers, some where 608d other where 200d but really the phone didn't ring. (a rate of 60% of calls was like this)
After collecting a few samples, and complaining to my upstream carrier, they had been improved immediately) On Wed, Jan 11, 2023 at 2:12 PM Calvin E. via VoiceOps < voiceops@voiceops.org> wrote: > Check the 608 responses for a Call-Info header. If present, it should > contain a point of contact for redress. > > https://www.rfc-editor.org/rfc/rfc8688.html#section-3.1-3 > "If there is a Call-Info header field, it MUST have the "purpose" > parameter of "jwscard". The value of the Call-Info header field MUST refer > to a valid JSON Web Signature (JWS) [RFC7515 > <https://www.rfc-editor.org/rfc/rfc8688.html#RFC7515>] encoding of a jCard > <https://www.rfc-editor.org/rfc/rfc8688.html#RFC7095> [RFC7095 > <https://www.rfc-editor.org/rfc/rfc8688.html#RFC7095>] object. The > following section describes the construction of the JWS.ΒΆ > <https://www.rfc-editor.org/rfc/rfc8688.html#section-3.1-3> > > You can also look into registering your calling numbers at sites like the > two below. It may also help to cover the basics like CNAM and a Directory > Listing to improve the "legitimacy" of the numbers. > > https://registeredcaller.com/ > > https://www.freecallerregistry.com/fcr/ > > Some analytics will assume the worst until proven otherwise. You could > attempt a low volume, low velocity, high ASR test pattern on an affected > carrier to ensure your calling numbers have some positive reputation > established before any mass calling. > > > On Wed, Jan 11, 2023 at 7:08 AM Dovid Bender via VoiceOps < > voiceops@voiceops.org> wrote: > >> Hi All, >> >> We are a small ITSP and every so often we have issues with calls that go >> to T-Mobile. We sign all our calls with our cert. Lately we have been >> getting 404's, 608's etc through 382, Telnyx and SIPRoutes. Bandwidth has >> been worse than the rest as they don't outright reject calls but they send >> a 100 trying and leave us hanging for 30 seconds. Peerless and one other >> carrier are completing the calls. Anyone know what makes T-Moble special >> that so many carriers will just 404 calls to their network? >> >> TIA. >> >> Dovid >> >> _______________________________________________ >> VoiceOps mailing list >> VoiceOps@voiceops.org >> https://puck.nether.net/mailman/listinfo/voiceops >> > _______________________________________________ > VoiceOps mailing list > VoiceOps@voiceops.org > https://puck.nether.net/mailman/listinfo/voiceops > -- *Pinchas S. Neiman* Software Engineer At ESEQ Technology Corp. 845.213.1229 #2
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