I'm interested in using my Nokia 6255 as a bluetooth modem together with an iPAQ. I'd like to know if anyone has managed to get similar setup already working....
By default Nokia CDMA phones are in circuit mode.
+crm=1 - puts phone into packet mode
+cso=33 - requests Service Option 33 (1xRTT packet data)
CDMA sets up a call based on the Service Option requested. For example:
Service option: 12=circuit data, 15=IS95B (14.4kbps packet), 33=IS95C (IxRTT), and there are service options for voice and fax
The IS707A CDMA protocol standard states that all CDMA devices must by default be in a circuit data state (crm=0).
CDMA devices that use a Qualcomm chipset are by default circuit (crm=0) but will also access packet data service options without changing +crm or any other AT commands. What Qualcomm have done is implement additional AT commands $qcmdr (data rate) and $qcso (service option). These commands are non-volatile and do not change with power off/on. Alternatively Nokia use a TI chipset and the data state is always restored back to circuit on power off/on hence the reason for having to run +crm=1;+cso=33 each time.
Depending on what ipaq you have .. you will need to load the ipaq bluetooth security patch.
Otherwise they won't pair correctly - definitely need this for 22xx series.
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