Reverse Engineering USB protocol for Sanyo 4900

Exactly what messages are the synching apps sending to the Sanyo 4900?
The issue was raised a little while ago in <a
href="http://groups.google.com/groups?hl=en&lr=lang_en&ie=UTF-8&safe=off&threadm=3E42A382.30001%40spam.com&rnum=1&prev=/groups%3Fq%3Dreverse%2Bengineer%2B4900%26hl%3Den%26lr%3Dlang_en%26ie%3DUTF-8%26safe%3Doff%26selm%3D3E42A382.30001%2540spam.com%26rnum%3
D1">this
message</a> but seems to have been forgotten. As far as I can guess,
when the handset is put into PC Sync mode, certain AT commands are
enabled. If someone with a copy of one of the several handset sync
apps would run a simple utility on it called "strings", found in unix
systems, this might give us some clues.

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› See More: Reverse Engineering USB protocol for Sanyo 4900

rum,

found this snippet in the usb driver .inf files (unzip) at
http://www.sanyo.com/wireless/techys...er_install.htm

HKR,, InactivityScale,1, 3c,00,00,00
HKR, Init, 1,, "AT<cr>"
;HKR, Init, 2,, "AT &F E0 &C1 &D2 V1 S0=0\V1<cr>"
HKR, Init, 2,, "ATE0V1<cr>"
HKR, Monitor, 1,, "ATS0=0<cr>"
HKR, Monitor, 2,, "None"
HKR, Answer, 1,, "ATA<cr>"
HKR, Hangup, 1,, "ATH E1<cr>"
HKR,, Reset,, "AT&F<cr>"
HKR, Settings, Prefix,, "AT"
HKR, Settings, SpeakerMode_On,, "M2"


[email protected] (Rum and Mayonnaise) wrote in message news:<[email protected]>...
> Exactly what messages are the synching apps sending to the Sanyo 4900?
> The issue was raised a little while ago in <a
> href="http://groups.google.com/groups?hl=en&lr=lang_en&ie=UTF-8&safe=off&threadm=3E42A382.30001%40spam.com&rnum=1&prev=/groups%3Fq%3Dreverse%2Bengineer%2B4900%26hl%3Den%26lr%3Dlang_en%26ie%3DUTF-8%26safe%3Doff%26selm%3D3E42A382.30001%2540spam.com%26rnum
%3D1">this
> message</a> but seems to have been forgotten. As far as I can guess,
> when the handset is put into PC Sync mode, certain AT commands are
> enabled. If someone with a copy of one of the several handset sync
> apps would run a simple utility on it called "strings", found in unix
> systems, this might give us some clues.

[email protected] (picnic) wrote in message news:<[email protected]>...
> rum,
>
> found this snippet in the usb driver .inf files (unzip) at
> http://www.sanyo.com/wireless/techys...er_install.htm
>
....

> ;HKR, Init, 2,, "AT &F E0 &C1 &D2 V1 S0=0\V1<cr>"

Cool! Those are standard modem commands. Now, I believe that the Sanyo
4900 contains the Sierra Wireless SB419 module, which means the exact
command set can be found in a PDF in the CDMA 1.x SDK, available if
you sign up as a developer on Sierra's website.

I can only assume, without some help from an owner of some PC Sync
software, that PC Synching also uses some AT commands, but which are
not listed in the Sierra Wireless documentation.

My next step is to run two complete scans of every AT command -- one
in PC Sync mode and one not in it -- and see if there are any
differences.