[asterisk-users] GSM and CDMA Gateways
Matt Riddell
matt at venturevoip.com
Sun Dec 23 18:38:36 CST 2007
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Dovid B wrote:
> And whats it called ? Where did you get it from ?
> ----- Original Message -----
> From: Cameron Hissey
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Sent: Friday, December 07, 2007 2:41 AM
> Subject: Re: [asterisk-users] GSM and CDMA Gateways
>
>
> i am using a GSM gateway that converts to a PSTN line which i have running into a TDM400P card.
> works a treat!
Ignoring top posting - sorry.
We use the 2N boxes - which although a little expensive have been great.
Every now and then we get a loud sound which was causing the echo
canceller in zaptel to go crazy and ended up killing the call.
Once I realised that the 2N box was using US impedance instead of NZ
impedance, the echo cancelling wasn't required and therefore the problem
disappeared.
There is a bit of PDD (Post Dial Delay), but this is because of the telco.
- --
Kind Regards,
Matt Riddell
Director
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