I have some success here after plugging in my old E169G USB 3G modem from 3HK
again (Attempt #1011)
-- [datacard0] Trying to connect on /dev/ttyUSB2...
-- [datacard0] Datacard has connected, initializing...
[Feb 7 16:46:09] WARNING[4513]: at_response.c:392 at_response_error: [datacard0] Error checking subscriber phone number
-- [datacard0] Datacard needs to be reinitialized. The SIM card is not ready yet
-- [datacard0] Error initializing Datacard
-- [datacard0] Datacard has disconnected
-- [datacard0] Trying to connect on /dev/ttyUSB2...
-- [datacard0] Datacard has connected, initializing...
-- [datacard0] Datacard initialized and ready
-- Accepting AUTHENTICATED call from 192.168.1xx.xxx:
> requested format = alaw,
> requested prefs = disabled,
> actual format = alaw,
> host prefs = disabled,
> priority = reqonly
-- Executing [xxxxxxxxxxx@DLPN_DP1:1] Dial("IAX2/6xxx-1202", "Datacard/g0/8529xxxxxxx") in new stack
[Feb 7 19:16:18] WARNING[10626]: channel.c:165 channel_request: [g0] Request to call on device which can not make call at this moment
[Feb 7 19:16:18] WARNING[10626]: app_dial.c:2039 dial_exec_full: Unable to create channel of type 'Datacard' (cause 44 - Requested channel not available)
== Everyone is busy/congested at this time (1:0/0/1)