Comments on: Simple VOIP test calls and Toll Fraud

By: Cisco: Mark voice packets at the network edge | FirstDigest

Cisco: Mark voice packets at the network edge | FirstDigest — Tue, 04 May 2010 20:53:34 +0000

[...] Simple VOIP test calls and Toll Fraud (blindhog.net) [...]

By: Josh

Josh — Wed, 13 Jan 2010 07:07:18 +0000

Ken,

If you restrict traffic between the CallManager and voice gateway, you will not be able to use the XLite SIP Phone.

You would need to modify the access-list or remove it temporarily.

Josh

By: Josh

Josh — Wed, 13 Jan 2010 07:05:13 +0000

Sephiroth,

Not everyone will need to make changes to their gateway. It is just something to think about.

Josh

By: Ken Johnson

Ken Johnson — Tue, 12 Jan 2010 19:44:10 +0000

Very interesting idea. Thanks.

I’ve always just used the ‘csim start’ command. This SIP method would allow an actual call.

I’d have to think about the ‘allow h323 to h323′. This would allow calls to forward off the VG. Not sure if I want that. But all I need is the ‘allow sip to h323′ for the XLite SIP Phone to work.

Also, if you restrict traffic between the CallManager and voice gateway with the firewall ACL, will the XLite SIP phone work? No SIP traffic from softphone to VG allowed.

By: Sephiroth

Sephiroth — Tue, 12 Jan 2010 15:12:49 +0000

Howdy Josh,

You are completely right man. It worked flawlessly. Since the VGW I managed has all its channels for voice I think I don´t need to put any restriction, only the restrictions for dialing.

Anyway, thanks a lot for the tip.

Thanks,
Sephiroth