Yealink SIP-T2 Series Provisioning Manual page 173

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.tran
sport =
(SIP-T28P: X
ranges from 1
to 6.
Integer
SIP-T26P/T22P:
X ranges from
1 to 3.
SIP-T20P: X
ranges from 1
to 2)
account.X.rere
gister_enable
=
(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.nap
tr_build =
(SIP-T28P: X
0 or 1
ranges from 1
to 6.
SIP-T26P/T22P:
X ranges from
Descriptions
It configures the transport type for
account X.
0-UDP
1-TCP
2-TLS
3-DNS-NAPTR
The default value is 0.
It configures whether the phone needs
to re-register the account when
encountering an INVITE failover, if the
SIP server is configured with a domain
name for account X.
0-Do not need to re-register
1-Need to re-register
The default value is 0.
It configures the way of SRV query
when there is no result from the NAPTR
for account X
query .
0-SRV query using UDP only
1-SRV query using UDP, TCP and TLS.
The default value is 0.
Appendix
Web Setting Path
Account->Register
->Transport
163