Network Address Translation; To Configure The Dns Srv Query Via Web User Interface; Server Redundancy - Yealink SIP-T2xP Administration Manual

The following figure illustrates the IP phone is able to failover to an alternate server
when there is no response to a REGISTER request.
Procedure
DNS SRV query can be configured using the configuration files or locally.
Configuration File
Local

To configure the DNS SRV query via web user interface:

1. Click on Account.
2. Select the desired account from the pull-down list of Account.
3. Select DNS-SRV from the pull-down list of the Transport.
4. Click Confirm to save the change.
Network Address Translation (NAT) is essentially a translation table that maps public IP
address and port combinations to private IP address and port combinations. This
reduces the need for a large amount of public IP addresses. The NAT feature helps
ensure security since each outgoing or incoming request must go through a translation
process, it also offers the opportunity to qualify or authenticate the request or match it to
a previous request. But in the VoIP environment, NAT translation may break end-to-end
connectivity.
<MAC>.cfg
Web User Interface
Configuring Advanced Features
Configure the DNS SRV query
on the IP phone.
For more information, refer to

Server Redundancy

on page
152.
Configure the DNS SRV query
on the IP phone.
Navigate to:
http://<phoneIPAddress>/cgi-bi
n/ConfigManApp.com?Id=4
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