Yealink SIP-T41S Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
165
Values 1-Enabled
Default
0
Supported
Devices
T57W, T54W, T53W, T53
Audio Codecs
CODEC is an abbreviation of COmpress-DECompress, capable of coding or decoding a digital data stream or sig-
nal by implementing an algorithm. The object of the algorithm is to represent the high-fidelity audio signal with a
minimum number of bits while retaining the quality. This can effectively reduce the frame size and the bandwidth
required for audio transmission.
The audio codec that the phone uses to establish a call should be supported by the SIP server. When placing a call,
the phone will offer the enabled audio codec list to the server and then use the audio codec negotiated with the
called party according to the priority.
Topics
Supported Audio Codecs
Audio Codecs Configuration
Supported Audio Codecs
The following table summarizes the supported audio codecs on the phones:
Codec Algorithm Reference Bit Rate Sample Rate Packetization Time
G.722.1c
G.722.1c
RFC 5577 48 Kbps 32 Ksps 20ms
G.722.1c RFC 5577 32 Kbps 32 Ksps 20ms
G.722.1c RFC 5577 24 Kbps 32 Ksps 20ms
G.722.1 G.722.1 RFC 5577 24 Kbps 16 Ksps 20ms
G722 G.722 RFC 3551 64 Kbps 16 Ksps 20ms
PCMA G.711 a-law RFC 3551 64 Kbps 8 Ksps 20ms
PCMU G.711 u-law RFC 3551 64 Kbps 8 Ksps 20ms
G729 G.729 RFC 3551 8 Kbps 8 Ksps 20ms
G726-16 G.726 RFC 3551 16 Kbps 8 Ksps 20ms
G726-24 G.726 RFC 3551 24 Kbps 8 Ksps 20ms
G726-32 G.726 RFC 3551 32 Kbps 8 Ksps 20ms
G726-40 G.726 RFC 3551 40 Kbps 8 Ksps 20ms
G723_53/ G723_63 G.723.1 RFC 3551
5.3 Kbps
6.3 Kbps
8 Ksps 30ms

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