Hi ! I just joind the mailing list after a few nights spent on reading all code written for softmodem drivers. There's an amazing amount of work that have been done there ! My project, is for Telecomix, wich was recently invlolved in getting Egypt back online using dialup services. We want to be able to create our own dialup services without the need for expensive modem racks (well, expensive is not the correct terme, but large and power hungry is). Our idea is to use SIP VoIP trunks to get incoming dialup calls and to terminate them on a software modem bank. Basic scheme : SIP trunk -> IPBX -> Softmodem Bank -> virtual TTYs -> PPP Wa already achieved basic serial line operation using IAXmodem and spandsp, but it misses most moderne modulation implementations. We are looking for at least v.34 implementation, with v.8 auto negotiation and .42 error correction (compression would be nice too, but let's be pragmatic). The interface would require for the modem implementation to take a raw audio feed as its input, with PCM coding at 8kHz sampling rate (G.711 actually). The output would be a virtual serial port driver with support for parsing AT commands (that we already have parts from spandsp). Would anyone be interested in joining the project ? Thanks ! -- Jérôme Nicolle
