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
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