Yealink SIP-T27P [622/841] Procedure

Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series IP Phones

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4. Click Confirm to accept the change.

To configure NAT traversal and STUN server via phone user interface:

1. Press Menu->Settings->Advanced Settings (default password: admin)

->Network->NAT->NAT Status.

2. Press or , or the Switch soft key to select the desired value from the NAT

Status field.

3. Enter the IP address or the domain name of the STUN server in the STUN Server

field.

4. Enter the port of the STUN server in the Port field.

5. Press the Save soft key to accept the change.

The IP phone reboots automatically to make settings effective after a period of time.

To configure NAT traversal for a specific account via phone user interface:

1. Press Menu->Settings->Advanced Settings (default password: admin) ->Accounts.

2. Press or to select the desired account and press the Enter soft key.

3. Press or , or the Switch soft key to select the desired value from the NAT

Status field.

4. Press the Save soft key to accept the change.

The IP phone reboots automatically to make settings effective after a period of time.

IP phones can send keep-alive packets to NAT device for keeping the communication

port open.

Procedure

Keep alive feature can be configured using the configuration files or locally.

Configuration File

<MAC>.cfg

Configure the type of keep-alive

packets on a per-line basis.

Parameters:

account.X.nat.udp_update_enable

Configure the keep-alive interval

on a per-line basis.

Parameters:

account.X.nat.udp_update_time

Local

Web User Interface

Configure the type of keep-alive

packets on a per-line basis.

Configure the keep-alive interval