Yealink T5 Series, Administrator'S Manual

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Phone Network
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Web UI Network->Advanced->NAT->STUN Server
Phone UI Settings->Advanced Settings (default password: admin) ->Network->NAT->STUN Server
Parameter
static.sip.nat_stun.port
[2]
<y0000000000xx>.cfg
Description
It configures the port of the STUN server.
Note : It works only if “static.sip.nat_stun.enable” is set to 1 (Enabled).
Permitted
Values
Integer from 1024 to 65535
Default 3478
Web UI Network->Advanced->NAT->STUN Port (1024~65535)
Phone UI Settings->Advanced Settings (default password: admin) ->Network->NAT->STUN Port
[1]
X is the account ID. For T58V/T58A/T56A, X=1-16; for CP960, X=1.
[2]
If you change this parameter, the phone will reboot to make the change take effect.
Keep Alive Configuration
Yealink phones can send keep-alive packets to the NAT device for keeping the communication port open.
The following table lists the parameters you can use to configure keep alive.
Parameter
account.X.nat.udp_update_enable
[1]
<MAC>.cfg
Description
It sets 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.
Permitted
Values
0 -Disabled
1 -Default (the phone sends the corresponding packets according to the transport protocol)
2 -Options (the phone sends SIP OPTIONS packets to the server)
3 -Notify (the phone sends SIP NOTIFY packets to the server)
Default 1
Web UI Account->Advanced->Keep Alive Type
Parameter
account.X.nat.udp_update_time
[1]
<MAC>.cfg
Description
It configures the interval (in seconds) at which the phone sends a keep-alive package.
Note : It works only if “account.X.nat.udp_update_enable” is set to 1, 2 or 3.
Permitted
Values
Integer from 15 to 2147483647
Default 30
Web UI Account->Advanced->Keep Alive Interval(Seconds)
[1]
X is the account ID. For T58V/T58A/T56A, X=1-16; for CP960, X=1.
Rport Configuration
As described in RFC 3581 , rport allows a client to request that the server sends the response back to the source IP
address and port from which the request originated. It helps the phone traverse symmetric NATs.