Why are calls not being received?

Question

Asterisk

asterisk + chan_dongle not working incoming call (busy)
Asterisk is fully configured, sip client connects, sms come and go problem with incoming calls.
The following error occurs when calling:
WARNING [14949][C-00000013]:pbx.c:4416 __ast_pbx_run: Channel 'Dongle/dongle1-0100000008' sent to invalid extensions but no invalid handler: context, priority=dongle1-in,[phone] ,1
sip.conf

[greyewi]
type=friend
host=dynamic
qualify=1000
callgroup=1-4
disallow=all
allow=ulaw
allow=alaw
callerid=7916
context=greyewi
dtmfmode=rfc2833

dongle.conf

[dongle1]
audio=/dev/ttyUSB1		; tty port for audio connection; 	no default value
data=/dev/ttyUSB2		; tty port for AT commands; 		no default value
context=dongle1-in
group=2
rxgain=4
txgain=5
autodeletesms=yes
resetdatacard=yes
u2diag=0
usecallingpres=yes
callingpres=allowed_passed_screen
imei=867884004496104
imsi=250998206449934

extensions.conf

[globals]
[general]
autofallthrough=yes

[dongle1-in]
exten => s,1,Dial(SIP/greyewi,30,t)
exten => s,n,Hangup()

Answer 1

Your call comes to the extension [phone], and only s is registered in the context . Since the special extension i (invalid) is also not registered, an error occurs.
You need to add or change the line in dongle.conf
exten=s