does anyone know a GSM/UMTS/LTE modem that has mini-PCIe interface and is able to deliver voice signal that can be passed to mod_gsmopen? The only one that has any kind of voice signal that I found, is Huawei MU609 and the like. But they deliver PCM voice as a raw signal on mini-PCIe pins which are marked as "reserved" in the interface specifications, so normally the boards don't have any wiring for those pins. I just don't like the idea of an USB dongle, and there are many hardware platforms with mini-PCIe interfaces. They work perfectly for mobile data, but I couldn't find any option for voice.