welcome italia

  1. Welcome Trunk Problem on Outgoing Call Double 183 Session Progress

    We have new Voip Provider "Welcome" on some customer with some problem, many problem resolved, but one problem STILL. When Outgoing Call Provider reply me: SIP 100 Trying SIP 183 Session Progress SIP/SDP 183 Session Progress, all other provider send us after 100 Trying, 183 SIP/SDP with Call...
    • atik
    • Thread
    • 183 fake ring ring back session progress welcome italia
    • Replies: 1
    • Forum: Phone System / PBX
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