CDMA AT Commands and the 6225

[Rick Measham]

I've decided to collect what information I can find regarding the Nokia 
6225 (and probably other Nokia CDMA phones) for the edification of 
others on this mailing list.

Personally I'm using a third party cable on linux. The cable is 
supported by a kernel module and I can talk to the phone without any 
problems.

AT Commands
===========
Back in April, before I joined this list, someone was talking about AT 
commands for Nokia's CDMA phones. I have this document also. Anyone else 
that wants it can download it from Nokia's site at: 
http://ncsp.forum.nokia.com/download/?asset_id=11798;ref=devx

To save other CDMA users running off to grab this document let me tell 
you the most important thing: You can't use anywhere near as many AT 
commands on the CDMA phones. The commands are limited to modem-control. 
There are no extended commands for such activites as recieving or 
sending SMS (my personal priority). The NOKIA FBUS command is there, 
implying that these phones will work with FBUS.

Another useful(?) document from Nokia is this one: 
http://nds2.forum.nokia.com/nnds/ForumDownloadServlet?id=14973&name=Messaging_Characteristics_In_Nokia_CDMA_Devices_v1_2_en.pdf 

It indicates that the CDMA devices are quite capable of these 
interactions, however I'm not sure if it's just referring to 
phone-to-phone messaging.

Nokia's CDMA FAQ 
(http://nds2.forum.nokia.com/nnds/ForumDownloadServlet?id=14943&name=CDMA_FAQ_v1_2.pdf) 
is useless. It's (once again) all about developing software for use on 
the phone, not for interfacing with it. However it did give me one 
useful piece of marketspeak: Aparently CDMA is the fastest growing 
mobile phone protocol, so by workingo on this, I'm not working on a 
dying system :)

FBUS on CDMA
============
Finding documentation on FBUS has been rather difficult. The actual 
protocol is discussed at this page: 
http://www.embedtronics.com/nokia/fbus.html
The author only pays attention to GSM phones and so we can only assume 
that a standard FBUS will work across all phones.

Gnokii and my 6225
==================
The 6225 is (aparently) a CDMA version of the 6220 (the SIM slot is 
still there even!). Given this, I would assume the same commands would 
do the same things. This appears not to be so. In another thread, I've 
detailed both using the phone as an AT device and a 6230 (which I found 
got further than the 6220).

Using Minicom, I've managed to put the phone into FBUS mode (how do you 
get it back without restarting?) and once I do that, gnokii seems to get 
further, but still no bananas.

I'm not sure where to go next. Nokia's own PC Suite works fine on 
windows so I'm sure we're just missing a small link in the chain. I'm 
perfectly willing to find that link, not to mention keen. From other 
messages it seems I'm not the only person wanting a CDMA device to work.

The next step I'll take is working with raw FBUS according to the 
information in the previously mentioned webpage. If I can at least 
confirm that the FBUS commands work in the same manner, I'll start to 
work out where gnokii's missing link is.

I'm very keen to hear from other users, particularly developers of 
gnokii. Has anyone ever tried to get CDMA phones working? Have you got 
anywhere? Has anyone got any more useful documentation? (Nokia's own 
developers sites gives a big fat zero for fbus!)

Cheers!
Rick Measham

(Followups to come in this thread unless I make a breakthrough and have 
something useful to announce)