Yealink SIP-T41S Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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Variable Value Description
$mac The MAC address of the IP phone.
$ip The IP address of the IP phone.
$model The IP phone model.
$firmware The firmware version of the IP phone.
$active_url
The SIP URI of the current account when the IP phone places a call, receives an incoming
call or establishes a call.
$active_user
The user part of the SIP URI for the current account when the IP phone places a call,
receives an incoming call or establishes a call.
$active_host
The host part of the SIP URI for the current account when the IP phone places a call,
receives an incoming call or establishes a call.
$local
The SIP URI of the caller when the IP phone places a call.
The SIP URI of the callee when the IP phone receives an incoming call.
$remote
The SIP URI of the callee when the IP phone places a call.
The SIP URI of the caller when the IP phone receives an incoming call.
$display_local
The display name of the caller when the IP phone places a call.
The display name of the callee when the IP phone receives an incoming call.
$display_remote
The display name of the callee when the IP phone places a call.
The display name of the caller when the IP phone receives an incoming call.
$call_id The call-id of the active call.
$callerID The display name of the caller when the IP phone receives an incoming call.
$calledNumber The phone number of the callee when the IP phone places a call.
$exp_number The number of connected expansion modules.
$ehs_number The number of connected EHS.
$udisk_number The number of connected USB flash drives.
$usbheadset_number The number of connected USB headset devices.
$wifi_number The number of connected Wi-Fi dongles.
$bluetooth_number The number of connected Bluetooth dongles.
$vpn_ip The phone IP address assigned by the VPN server.
$cfg_all
The CFG configuration file contains all current configurations of the IP phone.
Note: The valid URI is: http://<serverIPAddress>/<filename>/?variable name=$variable
value.
Example:
http://10.82.21.10/Upload/?Cfg=$cfg_all
$cfg_local
The CFG configuration file contains all non-static parameters made via the phone user
interface and web user interface.
Note: It works only if “static.auto_provision.custom.protect” is set to 1 (Enabled). The valid
URI is: http://<serverIPAddress>/<filename>/?variable name=$variable value.
Example:

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