[SIPForum-discussion] SIP Error 481

[Abhisek Acharya]

Hey Buddy,


My initial question to you is open the INVITE message and check the FROM
and TO header.Also try to check the TO header in specific.There should be
no TO-TAG present in the TO header.As the Initial INVITE never contains a
TO-TAG.


481 means call-leg does not exist.You are saying call gets disconnected
after 5 minutes.Which means the call gets disconnected after the session is
established.Can you please check if the RE-INVITE contains the same FROM
and TO TAG or not.

Also Please send me the full wireshark trace and IP addresses.So that I can
quickly check and get back to you.

Regards
Abhisek



On Wed, Sep 19, 2012 at 2:03 PM, BULANDUS, Tristan L. <
tlbulandus at pldt.com.ph> wrote:

> Hi Team,****
>
> ** **
>
> We have a network set-up of SIP Peering services, with details below:****
>
> ** **
>
> ASTERISK PBX – SESSION BORDER CONTROLLER (PROXY) – HUAWEI SOFTSWITCH (PSTN
> GATEWAY)****
>
> [image: Description: cid:image001.png at 01CD9683.2CB34240]****
>
> ** **
>
> Calls originating from the PSTN Gateway is able to establish connection to
> Asterisk PBX but the call gets cut after 5 minutes. We experience Error 481
> from (SBC - 10.249.211.20) to (Asterisk – 10.251.3.153).****
>
> ** **
>
> Expert advice please on how to resolve this.****
>
> ** **
>
> Thank you very much.****
>
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