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Wannabe Geek

Topic # 4732 22-Aug-2005 13:01
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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....

Thanks and regards


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Hawkes Bay
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Reply # 18858 22-Aug-2005 14:00
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Welcome to Geekzone. Yes, it is possible. Have you checked out the Bluetooth dial up guide for iPaq Windows Mobile 2003 (GPRS or CDMA). Its probably the best place to start.

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Reply # 18860 22-Aug-2005 14:19
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You need to use the following string in the iPAQ modem profile:


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Reply # 18862 22-Aug-2005 14:25
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what does the cso=33 do? i have only ever used +crm=1

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Reply # 18864 22-Aug-2005 14:55
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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.

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  Reply # 18870 22-Aug-2005 19:13
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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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