The sysmocom team has been working on implementing an open source GPRS modem for DARC on behalf of a grant by ARDC. This talk will present the current state of the implementation and demonstrate how to use it.

DebugMux is a vendor specific interface/protocol exposed by [Sony] Ericsson phones and modems. Similar to QMI (Qualcomm MSM Interface), it allows debugging the GSM/GPRS/UMTS stack at run-time. In this talk I will demonstrate an open source DebugMux client software and share my findings about this interface, as well as other interfaces working on top of it.

Let's do a quick demo on what we can show in terms of the relatively now CSD (circuit switched data) support in osmocom CNI using some [ancient and new] GSM modems as well as GSM fax machines.

With some luck we might also have GSM <-> ISDN interworking for V.110 at the time of the talk.