Yealink SIP-T41S Administrator's Guide

Audio Features
176
Default
1
Web UI
Settings > Voice > Echo Cancellation > CNG
Jitter Buffer
Yealink phones support two types of jitter buffers: fixed and adaptive. A fixed jitter buffer adds the fixed delay to
voice packets. You can configure the delay time for the static jitter buffer on the phones. An adaptive jitter buffer is
capable of adapting the changes in the network's delay. The range of the delay time for the dynamic jitter buffer
added to packets can be also configured on the phones.
Topic
Jitter Buffer Configuration
Jitter Buffer Configuration
You can configure the mode of jitter buffer and the delay time for jitter buffer in the wired network or wireless net-
work.
The following table lists the parameters you can use to configure the jitter buffer.
Parameter
voice.jib.adaptive <y0000000000xx>.cfg
Description
It configures the type of jitter buffer in the wired network.
Permitted
Values
0-Fixed
1-Adaptive
Default
1
Web UI
Settings > Voice > Jitter Buffer > Type
Parameter
voice.jib.min <y0000000000xx>.cfg
Description
It configures the minimum delay time (in milliseconds) of the jitter buffer in the wired network.
Note: It works only if “voice.jib.adaptive” is set to 1 (Adaptive). The value of this parameter should be
less than or equal to that of “voice.jib.normal”.
Permitted
Values
Integer from 0 to 400
Default
60
Web UI
Settings > Voice > Jitter Buffer > Min Delay
Parameter
voice.jib.max <y0000000000xx>.cfg
Description
It configures the maximum delay time (in milliseconds) of the jitter buffer in the wired network.
Note: It works only if “voice.jib.adaptive” is set to 1 (Adaptive). The value of this parameter should be
greater than or equal to that of “voice.jib.normal”.
Permitted
Values
Integer from 0 to 400
Default
240
Web UI
Settings > Voice > Jitter Buffer > Max Delay
Parameter
voice.jib.normal <y0000000000xx>.cfg
Description
It configures the normal delay time (in milliseconds) of the jitter buffer in the wired network.
Note: It works only if “voice.jib.adaptive” is set to 0 (Fixed). The value of this parameter should be
greater than or equal to that of “voice.jib.min” and less than or equal to that of “voice.jib.max”.

Yealink SIP-T41S Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Keypad illumination	Yes
Wi-Fi	No
Networking standards	IEEE 802.3af
Ethernet LAN data rates	10, 100 Mbit/s
Ethernet LAN interface type	Fast Ethernet
Supported network protocols	SIP v1, SIP v2, LLDP/CDP/DHCP, OpenVPN, IEEE802.1X, IPv6, FTP/TFTP/HTTP/HTTPS
Volume control	Digital
Number of programmable keys	6
Lines quantity	6 lines
Phonebook capacity	1000 entries
Dual-Tone Multi-Frequency (DTMF) modes	In-band, Out-of band, SIP info
Input frequency	50/60 Hz
AC adapter input voltage	100 - 240 V
AC adapter output current	1.2 A
AC adapter output voltage	5 V
Display diagonal	2.7 \
Display resolution	192 x 64 pixels
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Voice codecs	CNG, G.711Mu, G.711a, G.723.1, G.726, G.729ab, VAD, iLBC
Certification	CE
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	189 mm
Width	212 mm
Height	175 mm
Package depth	223 mm
Package width	246 mm
Package height	120 mm