Yealink SIP-T38G Administrator's Guide

Administrator’s Guide for SIP-T3xG IP Phones
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6. Select the desired refresher from the pull-down list of Refresher.
7. Click Confirm to accept the change.
Call hold feature provides a service of putting an active call on hold. When a call is
placed on hold, the IP phone sends an INVITE request with a HOLD SDP to the server.
The IP phones support two call hold methods, one is RFC 3264, it is used to set the ―a‖
media attribute in the SDP to sendonly, recvonly or inactive, for example: a=sendonly.
The other is RFC 2543, it is used to set the ―c‖ connection addresses for the media
streams in the SDP to zero, for example: c=0.0.0.0.
Procedure
Call hold can be configured using the configuration files or locally.
Configuration File
<y0000000000xx>.cfg
Specify whether RFC 2543
(c=0.0.0.0) outgoing hold
signaling is used.
For more information, refer to Call
Hold on page 261.
Local
Web User Interface
Specify whether RFC 2543
(c=0.0.0.0) outgoing hold
signaling is used.

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