From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============2114365724369313642==" MIME-Version: 1.0 From: Lei Yu Subject: Re: [PATCH] doc: Add modem Type property Date: Fri, 21 Jan 2011 13:48:43 -0800 Message-ID: <4D39FF3B.2090902@nokia.com> In-Reply-To: <4D39F4F2.5090807@gmail.com> List-Id: To: ofono@ofono.org --===============2114365724369313642== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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". 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. Again, the problem we try to solve is single mode case. > > Regards, > -Denis Regards, - Lei --===============2114365724369313642==--