User guide

Appendix
75
voice.ring_vol
=
Integer
from 0 to 15
It configures the volume of ringer.
The default value is 8.
voice.group_s
pk_vol =
Integer
from 0 to 15
It configures the receiving volume of
the group listening mode.
The default value is 8.
voice.call_pre
view_mode =
1, 2 or 3
It configures the strategy for ring-back
tone.
1-Ignore: the phone plays the mix of
defined tone and received RTP for
ring-back tone
2-Force: the phone discards the
received RTP and plays the defined
tone for ring-back tone.
3-Skip: the phone skips the defined
tone and plays received RTP for
ring-back tone.
The default value is 1.
security.trust_c
ertificates =
0 or 1
It configures the source certificates for
the phone to authenticate the TLS
connection.
0-Disabled
1-Enabled
The default value is 1.
Security->Trusted
Certificates->Only
Accept Trusted
Certificates
security.ca_ce
rt =
0, 1 or 2
It specifies the type of certificates the
phone used to authenticate the
connecting server.
0-Default certificates
1-Custom certificates
2-All certificates
The default value is 0.
It takes effect after reboot.
Security->Trusted
Certificates->CA
Certificates
security.cn_val
idation =
0 or 1
It enables or disables the phone to
mandatorily validate the
CommonName or SubjectAltName of
the certificate received from the
connecting server.
0-Disabled
1-Enabled
The default value is 0.
Security->Trusted
Certificates->
Common Name
Validation