If there is no GPRS available or much too expensive (roaming) i prefer to use HSCSD. I have configured my hw6515 to access my ISP via CSD. I was using a HP Jornada 568 with a Nokia 6310i before, where I communicated to to the Nokia phone via bluetooth. The nokia was opening a HSCSD connection to my ISP. Now I would like to do the same with my hw6515. It seems to me that the hw6515 only connects with Normal Single Slot GSM Circuit Switched Data (CSD) @ 9600 Kbps. I am looking for a way to configure High Speed Circuit Switched Data (HSCSD) Multi-Slot GSM data calls of maximum uplink/downlink speeds of 43.2Kbps/14.4Kbps or 28.8Kbps/28.8Kbps.
On the Nokia 6310, I modified the dial string to force the modem to use HSCSD channel bundling in the following way:
9.6kb: AT+CBST=0,0,1;+CHSN=1,0,0,0<cr>
14.4kb: AT+CBST=0,0,1;+CHSN=2,0,0,0<cr>
19.2kb: AT+CBST=0,0,1;+CHSN=3,0,0,0<cr>
28.8kb: AT+CBST=0,0,1;+CHSN=4,0,0,0<cr>
43.2kb: AT+CBST=0,0,1;+CHSN=6,0,0,0<cr>
or
Automatic Negotiation
AT+CBST=81,0,1
Does anybody know how to configure the iPAQ hw6515 to do HSCSD?
