Yealink SIP-T2xP Auto Provisioning Manual page 256

Yealink IP Phones Auto provisioning Guide
Parameter
SIP-T21P/T20P: X ranges from 1 to 2.
SIP-T19P/CP860: X=1.)
account.X.nat.udp_update_enable =
(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.udp_update_time =
(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.rport =
246
Permitted Values
It configures the type of keep-alive packets
sent by the phone to the NAT device to keep
the communication port open so that NAT
can continue to function for account X.
0-Dsiabled
1-Default: the phone sends UDP packets to
0, 1, 2 or 3
the server.
2-Option: the phone sends SIP OPTION
packets to the server.
3-Notify: the phone sends SIP NOTIFY
packets to the server.
The default value is 1.
It configures the keep-alive interval (in
Integer from 15 to
seconds) for account X.
2147483647
The default value is 30.
0 or 1
It enables or disables NAT Rport feature for
Descriptions
Account-> Advanced->Keep Alive
Type
Account-> Advanced->Keep Alive
Interval (Seconds)
Account-> Advanced->RPort
Web Setting Path