[asterisk-users] GSM and CDMA Gateways

[Matt Riddell]

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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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