Yealink SIP-T57W Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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Parameter
auto_redial.enable <y0000000000xx>.cfg
Description
It enables or disables the phone to automatically redial the last dialed number when the callee is tem-
porarily unavailable.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Web UI
Features > General Information > Auto Redial
Phone UI
Color Screen Phones:
Menu > Features > Others > Auto Redial > Auto Redial
Black-and-white Screen Phones:
Menu > Features > Auto Redial > Auto Redial
Parameter
auto_redial.interval <y0000000000xx>.cfg
Description
It configures the interval (in seconds) for the phone to wait between redials.
The phone redials the last dialed number at regular intervals untill the callee answers the call.
Permitted
Values
Integer from 1 to 300
Default
10
Web UI
Features > General Information > Auto Redial Interval (1~300s)
Phone UI
Color Screen Phones:
Menu > Features > Others > Auto Redial > Redial Interval
Black-and-white Screen Phones:
Menu > Features > Auto Redial > Redial Interval
Parameter
auto_redial.times <y0000000000xx>.cfg
Description
It configures the auto redial times when the callee is temporarily unavailable.
The phone tries to redial the callee as many times as configured till the callee answers the call.
Permitted
Values
Integer from 1 to 300
Default
10
Web UI
Features > General Information > Auto Redial Times (1~300)
Phone UI
Color Screen Phones:
Menu > Features > Others > Auto Redial > Redial Times
Black-and-white Screen Phones:
Menu > Features > Auto Redial > Redial Times
Parameter
features.redial_via_local_sip_server.enable <y0000000000xx>.cfg
Description
It configures the phone to redial via local SIP server or remote SIP server.
Permitted
Values
0-Remote SIP Server
1-Local SIP Server
Default
1

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