Yealink SIP-T2 SERIES Administrator's Manual page 761

3. Select STUN from the pull-down list of NAT.
4. Click Confirm to accept the change.
To configure NAT traversal for IP call via web user interface (take SIP VP-T49G IP phones
for example):
1. Click on Account->SIP IP Call.
2. Select the desired value from the pull-down list of NAT.
3. Click Confirm to accept the change.
To configure local SIP port and TLS SIP port via web user interface:
1. Click on Settings->SIP.
2. Enter the desired local SIP port in the Local SIP Port field.
Configuring Advanced Features
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