Yealink SIP-T41S Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
501
2-rtp-pkt-loopback, the RTP payload is re-encapsulated and the RTP packets are looped back with a
new payload type and format. This type of loopback applies to the encapsulated and direct packet
loopback. Any type of encoding-related functions must not be part of this type of loopback path.
3-rtp-media-loopback & rtp-pkt-loopback, the answer must include only one of these two loopback
types and should give preference to the first loopback-type in the SDP offer.
Default
3
Parameter
sip.pkt_loopback_mode <y0000000000xx>.cfg
Description
It configures the encapsulation mode of incoming RTP packet.
Note: It works only if “sip.loopback_type” is set to 2 (rtp-pkt-loopback).
Permitted
Values
1-encapsulated packet loopback, the entire incoming RTP packet is encapsulated as payload within
an outer RTP packet. The loopback source can generate statistics for one-way path performance up
to the RTP level for each direction of travel.
2-directed packet loopback, the loopback mirror copies the payload of the incoming RTP packet into a
new RTP packet. The packet source can compute only two-way path statistics from the direct loop-
back packet header.
3-encapsulated & directed, the loopback mirror loops back the incoming RTP packets using either the
encapsulated RTP payload format or the direct loopback RTP payload format.
Default
3
Parameter
sip.pkt_loopback_encapsulated_payload <y0000000000xx>.cfg
Description
It configures the value of dynamic payload for encapsulated RTP.
Note: It works only if “sip.pkt_loopback_mode” is set to 1 (encapsulated packet loopback).
Permitted
Values
Integer greater than 98
Default
112
Parameter
sip.pkt_loopback_directed_payload <y0000000000xx>.cfg
Description
It configures the value of dynamic payload for the direct loopback RTP.
Note: It works only if “sip.pkt_loopback_mode” is set to 2 (directed packet loopback).
Permitted
Values
Integer greater than 98
Default
113
Parameter
sip.loopback.auto_answer.mode <y0000000000xx>.cfg
Description
It enables or disables the phone to automatically answer the incoming loopback call.
Permitted
Values
0-Disabled
1-Enabled
Default
1
Cloud
Yealink CP920 phones support cloud feature. The Cloud enterprise administrator uses the Yealink VC Cloud man-
agement service to assign each user an individual Cloud account. For more information, refer to Yealink VC Cloud
Management Service Administrator Guide .
After registered with a Yealink Cloud account successfully, the phone will download the Cloud accounts information
from the server automatically.

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