Yealink SIP-T57W Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
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Supported: timer
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Topic
Session Timer Configuration
Session Timer Configuration
The following table lists the parameters you can use to configure the session timer.
Parameter
account.X.session_timer.enable
[1]
<MAC>.cfg
Description
It enables or disables the session timer.
Permitted
Values
0-Disabled
1-Enabled, the phone will send periodic UPDATE requests to refresh the session during a call.
Default
0
Web UI
Account > Advanced > Session Timer
Parameter
account.X.session_timer.expires
[1]
<MAC>.cfg
Description
It configures the interval (in seconds) for refreshing the SIP session during a call.
An UPDATE will be sent after 50% of its value has elapsed. For example, if it is set to 1800 (1800s),
the phone will refresh the session during a call every 900 seconds.
Note: It works only if “account.X.session_timer.enable” is set to 1 (Enabled).
Permitted
Values
Integer from 90 to 7200
Default
1800
Web UI
Account > Advanced > Session Expires (90~7200s)
Parameter
account.X.session_timer.refresher
[1]
<MAC>.cfg
Description
It configures who refreshes the SIP session during a call.
Note: It works only if “account.X.session_timer.enable” is set to 1 (Enabled).
Permitted
Values
0-UAC
1-UAS
Default
0
Web UI
Account > Advanced > Session Refresher
[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.
Reboot in Talking
Reboot in talking feature allows the phones to reboot during an active call when it receives a reboot Notify mes-
sage.
Topic
Reboot in Talking Configuration

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