Network Manager GPRS support


I see for the archives that you are working on the GSM support in Network Manager. I work for Hutchison UK (three network) and we are keen for better Linux support of mobile broadband modems. I Have access to a number of dongles and PCs with embedded cards, and can assist with some level of testing.

As to the question on the current signal level received with at+csq this and many other commands are standardised in the 3GPP standard. 3GPP TS 27.007 AT command set for User Equipment (UE) available here:

Here is the section on +CSQ:

Signal quality +CSQ

Table 64: +CSQ action command syntax


Possible response(s)


+CSQ: <rssi>,<ber>

+CME ERROR: <err>


+CSQ: (list of supported <rssi>s),(list of supported <ber>s)



Execution command returns received signal strength indication <rssi> and channel bit error rate <ber> from the MT. Refer subclause 9.2 for possible <err> values.

Test command returns values supported as compound values.

Defined values


0    ‑113 dBm or less

1    ‑111 dBm

2...30 ‑109... ‑53 dBm

31  ‑51 dBm or greater

99  not known or not detectable

<ber> (in percent):

0...7   as RXQUAL values in the table in TS 45.008 [20] subclause 8.2.4

99  not known or not detectable

As to the current dongles we mostly are using the Huawei models E220, E169 E169g  these work with the usb_modeswitch program.
Are you incorporating this functionality?

-- Stuart Ward M +44 7782325143

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