Hi all, Can anybody here answer the following question (or point me to a more appropriate mailing list for questions of this kind)? According to the specification "USB Communication Class Subclass Specification for PSTN Devices", a USB device can define in its "call management functional descriptor", field "bmCapabilities" whether it handles call management itself or not. Do I understand correctly that a device that does NOT handle call management itself should not be able to support the "abstract control model (ACM)"? (Actually, there are devices that indicate in their functional descriptors that they are NOT able to handle call management, but nevertheless claim to support the ACM, e.g., the mobile phone "LGE KM900 Arena". Does this make sense?) Furthermore, the ACM specification allows two ways to send/receive call management information: either via the data class interface or via the communication class interface. The supported modes can also be indicated in the "bmCapabilities" field of the "call management functional descriptor". However, there are mobile phones (e.g., Nokia 6710 Navigator), which claim to support the ACM, but do not provide a "call management functional descriptor". So how do you know which mode is supported by such a device? Best regards, Andreas Schorr -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
