Hi Lei, >>> + string Type [readonly, optional, experimental] >>> + >>> + String representing the type of the modem device. >>> + >>> + The possible values are: >>> + "gsm" Modem supports one or more of the 3GPP >>> + family of technologies including GSM, >>> + EDGE, UMTS, HSPA, LTE. >>> + "cdma" Modem supports one or more of the 3GPP2 >>> + family of technologies including CDMA 1x, >>> + EVDO. >>> + "hfp" Bluetooth hands-free profile (HFP) modem >>> + >> >> So one pointed question: >> >> How are we planning to support dual-mode devices with this property? I >> believe during the CDMA workshop we decided that the clients should >> simply look at the set of interfaces, not a semi-static property... > > We understand that the decision during the CDMA workshop but as we > explained one use case in the cover letter > (http://lists.ofono.org/pipermail/ofono/2011-January/007890.html) for > this RFC, there will be cases where atom's D-Bus I/F is not suitable (or > as a reliable way) for telling what is current mode (CDMA or GSM). E.g., > in the case of retrieving serial number from modem. Currently both CDMA > and GSM shares the same I/F (ofono.org.modem) rather than having > separate (ofono.org.cdma.modem). And, further if no other atom has been > instantiated, then, there will be no other way to tell which mode (CDMA > or GSM) the modem is. And, further for displaying serial number, upper > layer will need to know it is CDMA or GSM. In case of CDMA, the serial > number is MEID and GSM it is IMEI. As explained in cover letter, we > anticipate more cases like this. So let us say I have a dual-mode modem. Are there now two serial numbers? One for MEID and one for IMEI? Are there now two Manufacturers? Two Revisions?

Regards, -Denis

Hi Lei, On 01/21/2011 03:48 PM, Lei Yu wrote: > Hi Denis, > > On 01/21/2011 01:04 PM, ext Denis Kenzior wrote: >> Hi Lei, >> >>>>> + string Type [readonly, optional, experimental] >>>>> + >>>>> + String representing the type of the modem device. >>>>> + >>>>> + The possible values are: >>>>> + "gsm" Modem supports one or more of the 3GPP >>>>> + family of technologies including GSM, >>>>> + EDGE, UMTS, HSPA, LTE. >>>>> + "cdma" Modem supports one or more of the 3GPP2 >>>>> + family of technologies including CDMA 1x, >>>>> + EVDO. >>>>> + "hfp" Bluetooth hands-free profile (HFP) modem >>>>> + >>>> >>>> So one pointed question: >>>> >>>> How are we planning to support dual-mode devices with this property? I >>>> believe during the CDMA workshop we decided that the clients should >>>> simply look at the set of interfaces, not a semi-static property... >>> >>> We understand that the decision during the CDMA workshop but as we >>> explained one use case in the cover letter >>> (http://lists.ofono.org/pipermail/ofono/2011-January/007890.html) for >>> this RFC, there will be cases where atom's D-Bus I/F is not suitable (or >>> as a reliable way) for telling what is current mode (CDMA or GSM). E.g., >>> in the case of retrieving serial number from modem. Currently both CDMA >>> and GSM shares the same I/F (ofono.org.modem) rather than having >>> separate (ofono.org.cdma.modem). And, further if no other atom has been >>> instantiated, then, there will be no other way to tell which mode (CDMA >>> or GSM) the modem is. And, further for displaying serial number, upper >>> layer will need to know it is CDMA or GSM. In case of CDMA, the serial >>> number is MEID and GSM it is IMEI. As explained in cover letter, we >>> anticipate more cases like this. >> >> So let us say I have a dual-mode modem. Are there now two serial >> numbers? One for MEID and one for IMEI? Are there now two >> Manufacturers? Two Revisions? > > Try to clarify what you try to ask first. Let's start with the dual-mode > case where the modem is integrated modem (one piece of HW) where it > supports both CDMA and GSM. Then, there is case where the phone actually > has both MEID and IMEI. And, these two numbers are actually the same > (note, per IMEI's assignment there is a pre-arranged segment for this > kind of world phone). And, in which case, one manufacture, one revision. > Per the other thread, in which case the "Type" will be something like > "gsm_cdma". So how does the modem type help you here if you have 'gsm_cdma'? Is the modem giving you a MEID? An IMEI? I'm not convinced the Type helps you in any way. It might help you for HFP, but certainly not the dual mode case.

> Of course, there can be case where two physical modems are in the device > in which case there will be two separate serial numbers and two > manufacturers and revisions. I am assuming you are not asking for this > case. Yes, I'm ignoring the true dual-mode dual-radio case right now. Regards, -Denis