The app Calls on our L5 can’t handle MMI codes for call forwarding management. @dos filed in issue here where more details are described: https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/issues/745
Call forwarding can be configured separately for:
all calls (unconditional)
if busy
if not answered
if out of reach
On AT modems, +CCFC command can be used to configure call forwarding.
I grabbed an AT cmd specification Broadmobi BM817C Series User AT Commands V2.0.0 .pdf and tried on my L5 the following:
purism@pureos:~/guru$ sudo kermit
C-Kermit 9.0.305 OPEN SOURCE: Alpha.02, 19 Sep 2020, for Linux+SSL+KRB5 (64-bit)
Copyright (C) 1985, 2020,
Trustees of Columbia University in the City of New York.
Type ? or HELP for help.
(/home/purism/guru/) C-Kermit>set line /dev/ttyUSB3
(/home/purism/guru/) C-Kermit>set speed 9600
/dev/ttyUSB3, 9600 bps
(/home/purism/guru/) C-Kermit>set carrier-watch off
(/home/purism/guru/) C-Kermit>set escape 21
(/home/purism/guru/) C-Kermit>connect
Connecting to /dev/ttyUSB3, speed 9600
Escape character: Ctrl-U (ASCII 21, NAK): enabled
Type the escape character followed by C to get back,
or followed by ? to see other options.
----------------------------------------------------
ATE
OK
AT+CCFC=?
+CCFC: (0,1,2,3,4,5)
OK
AT+CCFC=2,3,"+4989xxxxxxxx",145,1
+CME ERROR: 258
AT+CCFC=2,1,"+4989xxxxxxxx",145,1
OK
The 2 means on reason “no reply”, the 3 means “register” the given number, and the 1 means “enable” (not sure what this means exactly).
Why is 3 (register) not working?