One of the solution is using SIP UDP through common port. Like we have 
developed a softphone running on port 53, SSL 443 with security.


----- Original Message ----- 
From: "Abdul Lateef" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Thursday, December 15, 2005 1:02 AM
Subject: [Sip-implementors] ISP blocking ports


> Hi all,
>
> Really this main issues for all VoIP provider, if some
> ISPs are blocking the standard VoIP ports including
> RTP port range. And if we are going to change with
> another non-standard VoIP ports, they start to
> capturing SIP packets and blocking also the
> non-standard ports.
>
> So please let us create some logics to avoid such
> kinds of problem.
>
> --------
> Yours,
> Abdul Lateef
> Computer Programmer
> HATIF COM
> Mob: +974 - 5405022
> Tel: +974 - 4883068
> ICQ: 276994704
> YM!: abdul_zu
> Fax: +974 - 4883063
> Doha Qatar
> http://www.hatif.com
>
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