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Using Call Recording Feature on Yealink SIP-T2XP Phones
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Using Call Recording Feature on Yealink SIP-T2XP Phones
1. Summary .................................................................................................................................... 1
2. Recording triggered by SIP INFO ........................................................................................... 1
2.1 Configurations on the phone.............................................................................................. 1
2.2 How the SIP INFO works ........................................................................................................ 2
3. Recording triggered by HTTP URL........................................................................................... 3
3.1 Configurations on the phone.............................................................................................. 3
3.2 How the HTTP URL works ....................................................................................................... 4
4. Listen to the recordings ........................................................................................................... 6
5. The LCD icons during a recording ......................................................................................... 6
Using Call Recording Feature on Yealink SIP-T2XP Phones
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1. Summary
Call recording enables you to record a call. It depends on the support of server and the duration you can
record for is also defined by the server. Yealink phones, including T20, T22, T26 and T28, with firmware version
not lower than V50, support to set a DSS Key as record button that can be pressed during a call to request a
recording to the server. The phones themselves don’t have memory to store the recordings, what they can
do is only to trigger it on the server and indicate the recording status.
Normally, there are 2 main methods to trigger a recording on a certain server (PBX). One is for the phone to
send to the PBX a SIP INFO containing a specific header. The other is for the phone to send an HTTP URL to the
PBX. Certain server will know to deal with such messages and decide to start or stop a recording. This
document will show you how each method works and how to configure for each.
2. Recording triggered by SIP INFO
2.1 Configurations on the phone
(1) Via web management through page Phone -> DSS Key. Any DSS Key can be configured by
selecting Type as Record, as shown below:
(2) Via phone menu on LCD through Menu -> Features -> DSS Keys. Similar as it is on web page, just to
configure any wanted DSS Key as below:
Using Call Recording Feature on Yealink SIP-T2XP Phones
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2.2 How the SIP INFO works
2.2.1 Start a recording
Assume that you have DSS Key 1 configured as above, during an active call, if you press this button for
the first time, the phone will send out a SIP INFO to the PBX. The SIP message is like:
Receiving such a message, the certain supporting server will know to start recording.
2.2.2 Stop the recording
To stop recording, just to press the same button for the second time, with which the phone will send
the SIP INFO like below:
Using Call Recording Feature on Yealink SIP-T2XP Phones
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Receiving such a message, the certain supporting server will know to stop recording.
3. Recording triggered by HTTP URL
3.1 Configurations on the phone
(1) Via web management through page Phone -> DSS Key. Set any DSS Key by selecting the Type as
URL Record and assigning the Expansion with a certain URL. This is tested with Epygi PBX and the URL
for this PBX is http://10.1.2.224/phonerecording.cgi?model=yealink where IP 10.1.2.224 indicates the
SIP server address. As shown below:
Using Call Recording Feature on Yealink SIP-T2XP Phones
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(2) Similarly, it can be configured via phone menu through Menu -> Features -> DSS Keys, as shown
below:
3.2 How the HTTP URL works
3.2.1 Start a recording
Take Epygi PBX for example, assume that DSS Key 1 is well configured as above, by pressing this button
during an active conversation; the phone will send a HTTP GET to the server, like below:
If it is normal, the server will respond with 200 ok as below:
Using Call Recording Feature on Yealink SIP-T2XP Phones
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3.2.2 Stop a recording
During the recording, by pressing the DSS Key 1 for the second time, the recording will be stopped. The
same HTTP GET will be sent to the server, and the server will respond with the following 200 OK message:
3.2.3 Error responses:
In some cases, the recording won’t succeed because of some reasons. Here’re some explanations:
The recording box is full, which means that there’s no space to store the recordings. In this case, if you
are trying to start a recording, the server will respond with:
Using Call Recording Feature on Yealink SIP-T2XP Phones
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Similarly, there may be the following other response from the server:
The recording session cannot be started
The recording cannot be stopped
This call cannot be recorded
4. Listen to the recordings
It depends on the server. Take URL recording on Epygi PBX as example, the recordings are stored in a
special extension named Recording Box, you can simply dial to that extension to listen to the recordings
you have made.
5. The LCD icons during a recording
Based on the response from the server, there will be different ICON indications on the LCD:
Circumstance
ICON on LCD display
A recording is started
appears during recording
A recording cannot be started
appears for 1 second
A recording cannot be stopped
appears for 1 second, then goes back
to
The recording box is full
appears for 1 second
Using Call Recording Feature on Yealink SIP-T2XP Phones
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Cannot be recorded
appears for 1 second
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