User guide

Yealink IP Phones Auto Provisioning Guide
340
Parameter
Permitted
Values
Descriptions
Web Setting Path
SIP-T21(P) E2: X ranges from 1 to 2.)
2-DTMF
3-Telephone-Event
The default value is 0.
account.X.nat.nat_traversal
(SIP-T48G/T46G/T29G: X ranges from 1 to 16.
SIP-T42G: X ranges from 1 to 12.
SIP-T41P/T27P: X ranges from 1 to 6.
SIP-T23P/G: X ranges from 1 to 3.
SIP-T21(P) E2: X ranges from 1 to 2.)
0 or 1
It enables or disables the NAT traversal for
account X.
0-Disabled
1-STUN
The default value is 0.
Note: It works only if the value of the
parameter ―sip.nat_stun.enable‖ is set to 1
(Enabled).
Account->Register->NAT
account.X.nat.udp_update_enable
(SIP-T48G/T46G/T29G: X ranges from 1 to 16.
SIP-T42G: X ranges from 1 to 12.
SIP-T41P/T27P: X ranges from 1 to 6.
SIP-T23P/G: X ranges from 1 to 3.
SIP-T21(P) E2: X ranges from 1 to 2.)
0, 1, 2 or 3
It configures the type of keep-alive packets
sent by the IP 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 IP phone sends UDP packets to
the server).
2-Option (the IP phone sends SIP OPTION
packets to the server).
3-Notify (the IP phone sends SIP NOTIFY
Account->Advanced->Keep Alive
Type