Q2687 GPRS Bearer error 812 in USA


#1

Hi,
I use the Q2687 modem, with an AT&T SIM card (with roaming).
The modem was tested in Europe (the Netherlands) and everything worked fine.

Now the modem is in the USA (Cleveland).
And I get a CME Error 812 “Bearer connection failure: GPRS network failure”, with start bearer (AT+WIPBR=4,6,0)

The commands send to modem are:
AT+WOPEN=1
AT+WIPCFG=1
AT+WMBS=4,0
AT+CSQ (untill field is ok)
AT+WIPBR=6,1
AT+WIPBR=2,6,11,“isp.cingular”
AT+WIPBR=2,6,0,""
AT+WIPBR=2,6,1,""
AT+WIPBR=6,6,1
AT+WIPBR=4,6,0
=> ERROR (812 with CME enabled)

Can anybody help me out?
The SIM has GPRS, the GSM band should be fine, the APN should be fine, I’m out of options :frowning:

Thanks,
Sander


#2

i’ve heard that gprs coverage in the us is a lot poorer than in the netherlands, are you sure you’ve got coverage?