Yealink SIP-T38G Administrator's Guide

Configuring Advanced Features
143
5. Enter the period time in the MWI Subscription Period (Scope: 0~84600) (seconds)
field.
6. Click Confirm to accept the change.
Call recording enables a user to record a call. It depends on support from a SIP server.
When the user presses a 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 only 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 a 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

Yealink SIP-T38G Specifications

General

Expansion module support	Yes
Ethernet LAN (RJ-45) ports	2
Keypad number of keys	48
Touchscreen	-
Display resolution	480 x 272 pixels
Display number of colors	16.78 million colors
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	6
Voice codecs	G.711, G.722, G.723.1, G.726
Bluetooth	No
Security algorithms	802.1x RADIUS, HTTPS, SSL/TLS
AC adapter input voltage	100 - 240 V
AC adapter output voltage	5 V
Power consumption (typical)	4.6 W
Operating relative humidity (H-H)	10 - 95 %
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Compliance industry standards	IEEE 802.3af
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	204 mm
Width	273 mm
Height	42 mm
Weight	1050 g