Yealink SIP-T57W Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
299
Description
It enables or disables the phone to disable the account whose username is empty.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter
account.X.register_expires_overlap
[1]
<MAC>.cfg
Description
It configures the renewal time (in seconds) away from the registration lease.
Permitted
Values
Positive integer and -1
Default
-1
Parameter
account.X.subscribe_expires_overlap
[1]
<MAC>.cfg
Description
It configures the renewal time (in seconds) away from the subscription lease.
Permitted
Values
Positive integer and -1
Default
-1
[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.
Outbound Proxy in Dialog
An outbound proxy server can receive all initiating request messages and route them to the designated destination.
If the device is configured to use an outbound proxy server within a dialog, all SIP request messages from the
device will be sent to the outbound proxy server as a mandatory requirement.
Note: To use this feature, make sure the outbound server has been correctly configured on the device. For more information
on how to configure the outbound server, refer to Server Redundancy.
Topic
Outbound Proxy in Dialog Configuration
Outbound Proxy in Dialog Configuration
The following table lists the parameter you can use to configure the outbound proxy in dialog.
Parameter
sip.use_out_bound_in_dialog <y0000000000xx>.cfg
Description
It enables or disables the phone to send all SIP requests to the outbound proxy server mandatorily in
a dialog.
Note: It works only if “account.X.outbound_proxy_enable” is set to 1 (Enabled).
Permitted
Values
0-Disabled, only the new SIP request messages from the phone will be sent to the outbound proxy
server in a dialog.
1-Enabled, all the SIP request messages from the phone will be sent to the outbound proxy server in
a dialog.
Default
0
Web UI
Features > General Information > Use Outbound Proxy In Dialog

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