grandstream ht813

  1. Abdallah

    Unsupported Outbound calls are not working

    Hello everyone, I have a web-hosted 3cx PBX and Grandstream HT813 ATA on premice, I have set up a SIP account for the ATA and inbound calls come in fine. BUT outbound calls are not working, I have tried many forms and types I'm either getting "this number doesn't exist, contact admin, or...
    • Abdallah
    • Thread
    • ata grandstream ht813 outbound calls pstn
    • Replies: 7
    • Forum: Other
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