Yealink SIP-T2 SERIES Administrator's Manual page 624

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
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 the server an HTTP GET
message containing a specific URL. The server processes these messages and decides to start or
stop a recording.
Note
If it is a video call, you can only record the audio but not video by tapping record/ URL record
key. For more information on recording video calls, refer to
496.
It is not applicable to SIP-T19(P) E2 and CP860 IP phones.
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.
Example of a SIP INFO message:
Via: SIP/2.0/UDP 10.3.20.14:5060;branch=z9hG4bK1870385345
From: "1009" <sip:1009@10.2.1.48:5060>;tag=1385842459
To: <sip:1006@10.2.1.48:5060>;tag=2383911905
Call-ID: 0_1289812066@10.3.20.14
CSeq: 2 INFO
Contact: <sip:1009@10.3.20.14:5060>
Max-Forwards: 70
User-Agent: Yealink SIP-T23G 44.80.0.60
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.
Example of a SIP INFO message:
Via: SIP/2.0/UDP 10.3.20.14:5060;branch=z9hG4bK175716007
From: "1009" <sip:1009@10.2.1.48:5060>;tag=1385842459
To: <sip:1006@10.2.1.48:5060>;tag=2383911905
Call-ID: 0_1289812066@10.3.20.14
CSeq: 3 INFO
Contact: <sip:1009@10.3.20.14:5060>
Max-Forwards: 70
User-Agent: Yealink SIP-T23G 44.80.0.60
Record: off
Content-Length: 0
600
Screenshot and Recording on page