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CUBE settings for caller ID delivery to VoLTE Verizon and ATT cell phones

chris.feuers
Level 1
Level 1

I am trying to help a vendor get caller ID delivery working when calling VoLTE HD calling enabled cell phones.  I know that Verizon requires the numbering plan to be ISDN.  This Cube is using SIP trunks to the PSTN, so the only way to get the numbering plan to be ISDN is to use +E.164 numbering.  What else needs to be done at the CUBE?  With their current configuration, VoLTE enabled phones display the calling name as "Unknown" or "Restricted."   Caller ID to most telcos is working OK as they are sending 10 digits.

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