Call Recording - Yealink SIP-T46G Administrator's Manual

Administrator's Guide for SIP-T46G IP Phone
Call recording enables users to record calls. It depends on support from a SIP server.
When the user presses the call record key, the IP phone sends a record request to the
server. The IP phones themselves do not have memory to store the recording, what they
can do is to trigger the recording and indicate the recording status.
Normally, there are 2 main methods to trigger a recording on a certain server. We call
them record and URL record. Record is for the IP phone to send the server a SIP INFO
message containing a specific header. URL record is for the IP phone to send an HTTP
URL to the server. The server processes these messages and decides to start or stop a
recording.
Record
When a user presses a record key for the first time during a call, the IP phone sends a
SIP INFO message to the server with the specific header ―Record: on‖, and then the
recording starts.
The example of a SIP INFO message for reference:
Via: SIP/2.0/UDP 10.1.4.148:5063;branch=z9hG4bK1139980711
From: "827" <sip:827@192.168.1.199>;tag=2066430997
To:<sip:614@192.168.1.199>;tag=371745247
Call-ID: 1895019940@10.1.4.148
CSeq: 2 INFO
Contact: <sip:827@10.1.4.148:5063>
Max-Forwards: 70
User-Agent: Yealink SIP-T46G 28.71.0.10
Record: on
Content-Length: 0
When the user presses the record key for the second time, the IP phone sends a SIP
INFO message to the server with the specific header ―Record: off‖, and then the
recording stops.
The example of a SIP INFO message for reference:
Via: SIP/2.0/UDP 10.1.4.148:5063;branch=z9hG4bK1619489730
From: "827" <sip:827@192.168.1.199>;tag=1831694891
To:<sip:614@192.168.1.199>;tag=2228378244
Call-ID: 1051886688@10.1.4.148
CSeq: 3 INFO
Contact: <sip:827@10.1.4.148:5063>
Max-Forwards: 70
User-Agent: Yealink SIP-T46G 28.71.0.10
Record: off
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