Media Loopback; Media Loopback Configuration - Yealink SIP-T3 Administrator's Manual

Administrator's Guide for SIP-T2 /T3 /T4 /T5 /CP920 IP Phones
Default Blank
Supported
All phones except T48G, T46G, T42G, T41P and T29G
Devices
Parameter static.auto_provision.config_version.mac
It configures the version information of the MAC CFG configuration file.
After configuration, you can check the configuration file version information at the path: Menu > Status
Description
> Phone > MAC Version (phone user interface) or Status > Status > Version > MAC Version (web
user interface).
Permitted
String
Values
Default Blank
Supported
All phones except T48G, T46G, T42G, T41P and T29G
Devices
Parameter features.custom_version_info
It configures the version information of the CFG configuration file.
After configuration, you can check the configuration file version information at the path: Menu > Status
Description
> CFG Version (phone user interface) or Status > Status > Version > Configuration Version (web
user interface).
Permitted
String
Values
Default Blank
Supported
T48G, T46G, T42G, T41P, T29G
Devices

Media Loopback

The SIP RTP media loopback can be used to make test calls to verify the media path between the phone and
server.
RTP packets are looped back toward the source device. In a voice loopback call, an echo is heard at the device ori-
ginating the call.
For more information on media loopback, refer to
Topic

Media Loopback Configuration

Media Loopback Configuration
The following table lists the parameters you can use to configure media loopback.
Parameter sip.loopback.enable
It configures the loopback role for the phone.
Description
Note: After the phone accepts the loopback call, the mute feature will be automatically activated on
the phone.
0-Loopback-Mirror, the server initiates a loopback call, and the phone accepts the call and mirrors
(echoes) all received media back to the server.
Permitted
Values
1-Loopback-Source, the phone can initiate a loopback call as a media source or receive a loopback
call as a loopback mirror.
557
<y0000000000xx>.cfg
<y0000000000xx>.cfg
RFC 6849.
<y0000000000xx>.cfg