How can I control the modem?

[SocialNetworkingWasAMistake]

I'd like to programmatically place a call to a specific number and specify my own audio input and output streams. Is there any documentation around for this?

[Alho]

You Can find the modem manual in the wiki.

[spaetz]

I'd like to programmatically place a call to a specific number and specify my own audio input and output streams. Is there any documentation around for this?

Placing your call is as easy as xdg-open tel://<NUMBER> afaik. As for fudging audio streams, this is something where callaudiod, alsa and pulseaudio are involved, not the modem directly.