Yealink SIP-T23, Руководство по комплектации

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Appendix
101
Parameter
Permitted
Values
Descriptions Web Setting Path
sip.refer_by_header_auto_build 0 or 1
It configures the constitution of the refer-bye
header.
0-URI in the registration message
1-From header in the refer message
The default value is 0.
It takes effect after a reboot.
sip.reserve_characters
-_.!~*#'()&=+
$,;?/\0
It configures the special characters reserved
in the user name.
The default value is blank.
sip.tcp_port_random_mode 0, 1 or 2
It configures the listening port mode.
0-random source port (non 506x), fixed ports
(506x) carried in the contact, via header.
1-random source port (non 506x) and other
ports (non 506x) carried in the contact, via
header.
2-fixed source port (506x) and other ports
(506x) carried in the contact, via header.
The default value is 0.
It takes effect after a reboot.