another GPS idea - speed-sensitive voicemail

Ian Stirling ian.stirling at
Sun Jul 29 19:43:58 CEST 2007

Shachar Shemesh wrote:
> Michael Welter wrote:
>>You're confusing GSM (Global Systems Mobile) with the gsm codec in
> I find that highly likely. I'm pretty new to Asterisk.
>>  They have different meanings.  The codecs used by your mobile phone
>>are not the same as the gsm codec in Asterisk.
> But it does use some codec. Even if it's not the same one, there is a
> piece of software that can decompress it, and you can (probably) store
> pre-compressed message you just want to dump on the line.
> I realize this cannot be done due to licensing and other considerations.
> I'm just saying that the details may be wrong, but the principle stands.

No, you can't.
Because the modem does not give you the compressed data.
It gives you an analog output.
There is no way (published) to make it send out compressed data.

More information about the community mailing list