Detect Incoming CSD Call using QMI interface

IoT Modules MC/EM Series
1

Hi

Has anyone come across a neat way of detecting an incoming CSD call using the QMI interface / Sierra SDK callbacks?

We are using pppd daemon on the AT interface and therefore cannot use the standard +CRING: REL ASYNC to detect when a CSD call is incoming. (VoiceCallEvent callback dosen’t appear to fire when CSD calls are used.)

Thanks

Chris

2

Chris,

The QC platforms do not technically support CSD any longer (in some cases it will work but not guaranteed) as a result they will not have implemented a call back for it and since it is technically not supported in the chipset there is no value in Sierra implementing it hence I do not think there is an easy method to do it.

What unit are you using?

Regards

Matt

3

Hi mlw

Thanks for the reply. I have actually found a work around using the pppd configuration allowing my code to detect CSD setup and tear-down.

For your ref: Using MC7304

Thanks

Chris