Yealink SIP-T40G Administrator's Guide

Audio Features
182
[1]
X is the account ID. For T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G, X=1-16; for
T53W/T53/T43U/T42G/T42U/T42S, X=1-12; for T41P/T41S/T27G, X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21
(P) E2, X=1-2; for T19(P) E2/CP920, X=1.
[2]
If you change this parameter, the phone will reboot to make the change take effect.
Suppress DTMF Display
Suppress DTMF display allows the phones to suppress the display of DTMF digits during an active call. DTMF digits
are displayed as “*” on the phone screen. Suppress DTMF display delay defines whether to display the DTMF digits
for a short period of time before displaying as “*”.
Topic
Suppress DTMF Display Configuration
Suppress DTMF Display Configuration
The following table lists the parameters you can use to configure the suppress DTMF display.
Parameter
features.dtmf.hide <y0000000000xx>.cfg
Description
It enables or disables the phone to suppress the display of DTMF digits during an active call.
Permitted
Values
0-Disabled
1-Enabled, the DTMF digits are displayed as asterisks.
Default
0
Web UI
Features > General Information > Suppress DTMF Display
Parameter
features.dtmf.hide_delay <y0000000000xx>.cfg
Description
It enables or disables the phone to display the DTMF digits for a short period before displaying aster-
isks during an active call.
Note: It works only if “features.dtmf.hide” is set to 1 (Enabled).
Permitted
Values
0-Disabled
1-Enabled
Default
0
Web UI
Features > General Information > Suppress DTMF Display Delay
Transfer via DTMF
Call transfer is implemented via DTMF on some servers. The IP phone sends specified DTMF digits to the server for
transferring calls to third parties.
Topic
Transfer via DTMF Configuration
Transfer via DTMF Configuration
The following table lists the parameters you can use to configure the transfer via DTMF.
Parameter
features.dtmf.replace_tran <y0000000000xx>.cfg
Description
It enables or disables the phone to send designated DTMF sequences for transfer function when
pressing the Tran/Transfer soft key or TRAN/TRANSFER key.
Permitted
Values
0-Disabled
1-Enabled

Yealink SIP-T40G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Wall mountable	Yes
Wi-Fi	No
Security algorithms	AES, HTTPS, SSL/TLS
Networking standards	IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	FTP, TFTP, HTTP, HTTPS
Voice codecs	G.711, G.711a, G.711u, G.722, G.726, G.729ab
RJ-11 ports quantity	1
Ethernet LAN (RJ-45) ports	2
AC adapter input voltage	100 - 240 V
AC adapter output current	0.6 A
AC adapter output voltage	5 V
Power consumption (typical)	1.6 W
Certification	CE, FCC, ISO 9001
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 90 %
Volume control	Digital
Display diagonal	2.3 \
Display resolution	132 x 64 pixels
Lines quantity	3 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	3
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	175 mm
Width	212 mm
Height	54 mm