Yealink SIP-T57W Administrator's Guide

Call Features
370
Permitted
Values
0-Disabled
1-Enabled
Default
0
[1]
X is from 1 to 3.
[2]
X is from 1 to 255.
[3]
X is the account ID. For T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G, X=1-16; for
T53W/T53/T43U/T42U/T42G/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.
Hotline
Hotline, sometimes referred to as hot dialing, is a point-to-point communication link in which a call is automatically
directed to the preset hotline number. If you lift the handset, press the Speakerphone key or the line key, and do
nothing for a specified time interval, the phone will automatically dial out the hotline number. Yealink phones only
support one hotline number.
Note: If you do not specify a line, the phone uses the first available line to dial out the hotline number by default.
This feature works only if the Off Hook Hot Line Dialing feature is disabled. For more information, refer to Off Hook Hot Line
Dialing.
Topic
Hotline Configuration
Hotline Configuration
The following table lists the parameters you can use to configure hotline.
Parameter
features.hotline_number <y0000000000xx>.cfg
Description
It configures the hotline number that the phone automatically dials out when you lift the handset, press
the Speakerphone/off-hook key or the line key.
Leaving it blank disables hotline feature.
Note: Line key is not applicable to T19(P) E2/CP920 phones, handset and Speakerphone key are not
applicable to CP920 phones; the off-hook key is only applicable to CP920 phones.
Permitted
Values
String within 32 characters
Default
Blank
Web UI
Features > General Information > Hotline Number
Phone UI
Color Screen Phones:
Menu > Features > Others > Hot Line > Hotline Number
Black-and-white Screen Phones:
Menu > Features > Hot Line > Hotline Number
Parameter
features.hotline_delay <y0000000000xx>.cfg
Description
It configures the waiting time (in seconds) for the phone to automatically dial out the preset hotline
number.
If it is set to 0 (0s), the phone will immediately dial out the preset hotline number when you lift the
handset, press the Speakerphone/off-hook key or press the line key.

Yealink SIP-T57W Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Gray
Ethernet LAN	Yes
Wi-Fi standards	802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
Security algorithms	AES, HTTPS, MD5, SRTP
Networking standards	IEEE 802.11a, IEEE 802.11ac, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	FTP/TFTP/HTTP/HTTPS
Dual-Tone Multi-Frequency (DTMF) modes	In-band, Out-of band, SIP info
USB 2.0 ports quantity	1
Ethernet LAN (RJ-45) ports	2
Lines quantity	- lines
Phonebook capacity	1000 entries
Number of VoIP accounts	16
AC adapter input voltage	100 - 240 V
AC adapter output current	2 A
AC adapter output voltage	5 V
Volume control	Buttons
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Display diagonal	7 \
Display resolution	800 x 480 pixels
Front camera	No
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Voice codecs	G.722, G.723.1, G.726, G.729A, G.729B, iLBC

Weight and Dimensions

Depth	220 mm
Width	259.4 mm
Height	211 mm