[Asterisk-Users] Using Zyxel Analog Telephone adapter with a GSM gateway

[Jean-Michel Hiver]

Stig Thune wrote:

> Searching through wiki and google.
> http://www.2n.cz/products/gsm_gateways/voip/voiceblue.html
> but there are also other products on the market.
> ---
>  
> Wondering if its possible to connect as follows:
>  
> Extension -> Asterisk -> ZyxelAnalogTelephoneAdapter -> GSM gateway.

If I understand, you are doing.

Extension (VoIP) -> (VoIP) Asterisk (VoIP) -> (VoIP) Zyxtel (FXS) -> 
(FXS) GSM

Unless I've missed something, it seems that you are trying to plug a 
telephone adapter (Zyxtel) to another telephone adapter (FXS). FXS <-> 
FXS can't work. What you need is to plug in an FXO card in your * box so 
you can do:

Extension (VoIP) -> (VoIP) Asterisk (FXO) -> (FXS) GSM.

Or even simpler, you could grab a $100 sipura 3k and a $150-200 
"cellsocket" or "dock'n talk" device and you *should* get a simple, 
functional 1 channel VoIP GSM gateway for about $300 (plus the cost of 
the phone which is usually given away with subscription anyway). I've 
never tried it though...

In comparison, the voiceblue GSM gateway costs a hefty $2,500 for 4 
channels... so you can get about twice the channels for about the same 
price. Except you might have to hack around, which costs time :)

Cheers,
Jean-Michel.