Yealink SIP-T53W Administrator's Guide

Advanced Features
438
Default
0
Supported
Devices
All phones except T19(P) E2 and CP920
Parameter
sip.terminate_notify_sub_delay_time <y0000000000xx>.cfg
Description
It configures the interval (in seconds) for the phone to re-subscribe when it receives the NOTIFY mes-
sage with the subscription state of Terminated.
If it is set to 0, the phone will re-subscribe immediately.
Permitted
Values
Integer greater than 0
Default
0
Supported
Devices
All phones except T19(P) E2 and CP920
Parameter
sip.sub_refresh_random <y0000000000xx>.cfg
Description
It enables or disables the phone to use the random renewal mechanism.
Note: It works only if “account.X.subscribe_expires_overlap" is set to 0 (Disabled).
Permitted
Values
0-Disabled
1-Enabled, the phone will generate a random value. The final renewal time is equal to the original
renewal time plus the random value.
Default
0
Supported
Devices
All phones except T19(P) E2 and CP920
Parameter
features.blf_extension.mode <y0000000000xx>.cfg
Description
It configures the function of the extension value when the dsskey type is set to BLF.
Note: The URI to which the SUBSCRIBE message should be sent is always the BLF value@<server-
IPaddress> .
Permitted
Values
0-Act as the user part of the SIP URI in a SIP INVITE message when pressing the BLF key
1-Act as the pickup code when picking up incoming calls to another phone
Default
1
Case Scen-
ario
Application scenarios (features.blf_extension.mode = 0):
The phone supports configuring BLF when SIP user is different from the number of the extension.
For example:
Set the SIP user (user part of the SIP URI) to be juhaszandrea@<serverIPaddress>, and the cor-
responding number of extension is 3060@<serverIPaddress> on the server.
Set the BLF key on the phone:
linekey.1.type = 16
linekey.1.value = juhaszandrea
linekey.1.extension = 3060
Result:
1. The URI to which the SUBSCRIBE message is juhaszandrea@<serverIPaddress>.
2. The phone dials out 3060@<serverIPaddress> when pressing the BLF key.
Supported
All phones except T48G, T46G, T42G, T41P, T29G, T19(P) E2 and CP920

Yealink SIP-T53W Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP mobile phone
Product color	Gray
Keypad illumination	Yes
Wi-Fi standards	802.11a, 802.11g, Wi-Fi 4 (802.11n)
Bluetooth version	4.2
Security algorithms	AES, HTTPS, SIPS
Networking standards	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	8 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	12
AC adapter input voltage	100 - 240 V
AC adapter output current	1.2 A
AC adapter output voltage	5 V
Power consumption (typical)	2.3 W
Volume control	Buttons
Number of programmable keys	8
Storage temperature (T-T)	-30 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Display diagonal	3.7 \
Display resolution	360 x 160 pixels
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Number of DECT wireless handsets	4
Voice codecs	G.722, G.723.1, G.726, G.729A, G.729B, OPUS, iLBC

Weight and Dimensions

Depth	210.6 mm
Width	212 mm
Height	174.5 mm