Yealink SIP-T53W Administrator's Guide

Advanced Features
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Example
features.pickup.blf_visual_enable = 1
features.pickup.blf_audio_enable = 1
When the monitored line receives an incoming call, the phone screen shows an incoming call to the monitored line
(for example, “6001<-6002”, 6001 is the monitored extension which receives an incoming call from 6002) (from
1008 to 1001), the following occurs on the phone:
l The phone plays a specific alert tone.
l The BLF key LED flashes red. On the T57W/T48U/T48S/T48G IP phone, the icon / flashes.
l The caller ID appears on the phone screen.
The following shows a visual alert for monitor line on T46S/G phones:
You can pick up the call to the monitored line, place a call to the monitored line, place a new call or back to the idle
screen.
LED Mode for BLF/BLF List Key
BLF LED Mode provides five kinds of definition for the BLF/BLF List key LED status. As there is no hard line key on
T57W/T48U/T48S/T48G phones, BLF LED mode configuration is applicable to any phones and expansion module,
except T57W/T48U/T48S/T48G and T19(P) E2/CP920 phones.
Topics
Supported BLF LED Modes
BLF LED Mode Configuration
Supported BLF LED Modes
The following table lists the LED statuses of the BLF/BLF list key when BLF LED Mode is set to 0, 1, 2, 3 or 4 respect-
ively. The default value of BLF LED mode is 0.
Line key/Expansion Module Key LED (configured as a BLF key or a BLF List key and BLF LED Mode is set to 0)
LED Status Description
Solid green The monitored user is idle.
Fast-flashing red
(200ms)
The monitored user receives an incoming call.
Solid red
The monitored user is dialing.
The monitored user is talking.
The monitored user’s conversation is placed on hold (This LED status requires server sup-
port).
Slowly-flashing red (1s) The call is parked against the monitored user’s phone number.

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