Modem connected via USB: sniffing of "AT commands" possible?

Question

Hi guys, can somebody confirm if I can use USB sniffing to capture the "AT commands" sent to an HSDPA modem from an external application?

Answer 1

In USB parliance, modems belong to the Communications Device Class.

I believe this class specifies use of AT commands (more correctly called Hayes commands) for supporting devices, so yes, you should be able to see the AT commands if you have a bus sniffer.