Yealink SIP-T57W Administrator's Guide

General Features
492
[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.
Return Code for Refused Call
You can define the return code and reason of the SIP response message for the refused call. The caller’s phone
LCD screen displays the reason according to the received return code. Available return codes and reasons are:
l 404 (Not Found)
l 480 (Temporarily Unavailable)
l 486 (Busy Here)
l 603 (Decline)
Topic
Return Code for Refused Call Configuration
Return Code for Refused Call Configuration
The following table lists the parameters you can use to configure the return code for the refused call.
Parameter
features.normal_refuse_code <y0000000000xx>.cfg
Description
It configures a return code and reason of SIP response messages when the phone rejects an incom-
ing call. A specific reason is displayed on the caller’s phone screen.
Permitted
Values
404-Not Found
480-Temporarily Unavailable
486-Busy Here
600-Busy Everywhere
603-Decline
Default
486
Web UI
Features > General Information > Return Code When Refuse
Return Code for Unanswered Call
You can define the return code and reason of the SIP response message for the unanswered call. The caller’s
phone LCD screen displays the reason according to the received return code. Available return codes and reasons
are:
l 404 (Not Found)
l 480 (Temporarily Unavailable)
l 486 (Busy Here)
l 603 (Decline)
This feature is not applicable to T48G/T46G/T42G/T41P/T29G phones.
Topic
Return Code for Unanswered Call Configuration
Return Code for Unanswered Call Configuration
The following table lists the parameters you can use to configure the return code for the refused call.
Parameter
features.no_answer_code <y0000000000xx>.cfg

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