Yealink SIP-T2xP Auto Provisioning Manual page 255

Parameter
SIP-T26P/T22P/ T42G/T41P: X ranges from 1 to 3.
SIP-T21P/T20P: X ranges from 1 to 2.
SIP-T19P/CP860: X=1.)
account.X.nat.nat_traversal =
(SIP-T28P/T48G/T46G: X ranges from 1 to 6.
SIP-T26P/T22P/ T42G/T41P: X ranges from 1 to 3.
SIP-T21P/T20P: X ranges from 1 to 2.
SIP-T19P/CP860: X=1.)
account.X.nat.stun_server =
(SIP-T28P/T48G/T46G: X ranges from 1 to 6.
SIP-T26P/T22P/ T42G/T41P: X ranges from 1 to 3.
SIP-T21P/T20P: X ranges from 1 to 2.
SIP-T19P/CP860: X=1.)
account.X.nat.stun_port =
(SIP-T28P/T48G/T46G: X ranges from 1 to 6.
SIP-T26P/T22P/ T42G/T41P: X ranges from 1 to 3.
Permitted Values
"AUTO or SIP INFO" for account X.
0-Disabled
1-DTMF-Relay
2-DTMF
3-Telephone-Event
The default value is 0.
It enables or disables the NAT traversal for
account X.
0-Disabled
0 or 1
1-Enabled
The default value is 0.
It configures the IP address or domain name
IP address or
of the STUN server for account X.
domain name
The default value is blank.
It configures the port of the STUN server for
Integer from 1024 to
account X.
65000
The default value is 3478.
Descriptions
Account->Register ->NAT
Account->Register ->STUN Server
Account->Register ->STUN Server
->Port
Appendix
Web Setting Path
245