MC7710 and UMTS ?

[reiner otto]

Hurrah, I managed to have the MC7710 up and running on my embedded debian. But only using GSM ;-(
PING 8.8.8.8 takes about 1s average. 

Surfing the web is quite sloooooooooooow.

Using the same SIM on a cheap ZTE USB-stick under WIndows is much faster, using UMTS.
What I consider interesting:

[/dev/cdc-wdm0] Successfully got system selection preference
        Emergency mode: 'no'
        Mode preference: 'cdma-1x, gsm'
        Band preference: 'gsm-dcs-1800, gsm-900-extended, gsm-900-primary, gsm-pcs-1900, wcdma-2100, bc-15'
        LTE band preference: '1, 3, 7, 8, 20'
        Roaming preference: 'any'
        Network selection preference: 'automatic'
        Service domain preference: 'cs-ps'
        Service selection preference: 'automatic'
root at voyage:/etc/firewall#  qmicli -d /dev/cdc-wdm0  --nas-set-system-selection-preference=umts
error: couldn't set operating mode: QMI protocol error (25): 'DeviceUnsupported'

BUT

[/dev/cdc-wdm0] Device capabilities retrieved:
        Max TX channel rate: '50000000'
        Max RX channel rate: '100000000'
               Data Service: 'simultaneous-cs-ps'
                        SIM: 'supported'
                   Networks: 'gsm, umts, lte'


l# lsusb
Bus 002 Device 002: ID 1199:68a2 Sierra Wireless, Inc.

Using qmi_wwan.c from kernel 3.4.14 

(When I wrote device drivers in the very past, in various Assemblers, it was a good style to have a version number in the src, updated even in case some data structures were modifed only. And a modification history kept in the src etc. :-)


Frequencies should be these:
uplink: 1959,9 – 1969,8 MHz
downlink: 2149,9 – 2159,8 MHz

According to Mobile Provider, verified using USB-Modem Stick under WIndows
GSM/UMTS/HSPA (3G/H/H+) is good at my place.
Any idea, how to switch to umts ?

BTW: Switching to lte is possible with qmicli, but modem does not work, as I have no radio coverage here.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/libqmi-devel/attachments/20140529/35497e60/attachment.html>