[ksabc]

In general, the ISP can block the TCP 1720 port only, try to :

1. If both VOIP Gateway in two endpoint support modifying the H.225 Q.931 TCP port ( like change to 1721 ), change them;

2. Most VOIP Gateway can’t modify the TCP port of Q.931, try to use some Port Mapping software like :
PortTunnel http://www.steelbytes.com
GDataPipe http://www.gwacc.co.za/software.htm
PortMapper http://www.analogx.com

So it should works like :

VOIP—1720—PortMappingComputer—1721—–Internet—–1721—PortMappingComputer—1720—VOIP

Good luck.

[Ahmed Hashim]

Can someone please tell me of a product hardware that is not needed on both sides that can pass through \voip calls currently the ISP has blocked please respond ASAP thank you

[kevin gray]

ahmed you can do it with gateways at either end depending on the kit your using. if you want to discuss let me know!

[Ahmed]

Kevin please explain what you mean

[Mohammed Hussein]

The only backbone for internet in kenya is Jambo net but for reasons unknown they have blocked VoIp thus i cannot get connection to net2phone servers please can someone advice me how i can go over it, thanks Mohammed

[Author]

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