No recive message from SIP server

Discussion in 'VOIP' started by zazzaa321, Mar 30, 2012.

  1. zazzaa321

    zazzaa321

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    Hi all,

    I have a problem with firewall (I think). I use DrayTek Vigor IPPBX 2820 as SIP server and to the outside I cal through ISDN. As SIP phone I use 3CX. In the internal network everything goes like charm. From outside network the phone registers perfect, but when I make a call (for exemple) to my mobile phone The rings, but when I answer it, the 3CX is do not recive answering message.
     
    zazzaa321, Mar 30, 2012
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  2. zazzaa321

    zazzaa321

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    Thanks for answer, but in your suggestion from where should I start to look.
     
    zazzaa321, Apr 9, 2012
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