[Asterisk-biz] Affordable GSM to SIP gateways?

[Remco Barende]

Hi list!

Anyone managed to find reasonably priced GSM to SIP gateways?

Analog GSM gateways can be found around USD 100 for a single channel but 
anything with SIP in it seems to cost at least 10 times as much.

Most customers cannot justify spending USD 1000 to save several 10s of EUR 
per month.

Going analog is not really an option.

Thanks!
Remco