Yealink SIP-T2 Series Provisioning Manual page 203

Permitted
Parameter
Values
ranges from 1
to 6.
SIP-T26P/T22P:
X ranges from
1 to 3.
SIP-T20P: X
ranges from 1
to 2)
account.X.dtm
f.info_type =
(SIP-T28P: X
ranges from 1
to 6.
1, 2 or 3
SIP-T26P/T22P:
X ranges from
1 to 3.
SIP-T20P: X
ranges from 1
to 2)
account.X.nat.
nat_traversal
=
(SIP-T28P: X
ranges from 1
to 6.
0 or 1
SIP-T26P/T22P:
X ranges from
1 to 3.
SIP-T20P: X
ranges from 1
to 2)
account.X.nat.
stun_server =
IP address
(SIP-T28P: X
or domain
ranges from 1
name
to 6.
SIP-T26P/T22P:
X ranges from
Descriptions
It configures the DTMF info type when
the DTMF type is configured as "SIP
INFO", "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
1-Enabled
The default value is 0.
It configures the IP address or domain
name of the STUN server for account X.
The default value is blank.
Appendix
Web Setting Path
Account->
Advanced->DTMF
Info Type
Account->Register
->NAT
Account->Register
->STUN Server
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