Yealink SIP-T53W Getting Started

Recovery Mode on Yealink IP phones
16
For CP960 IP Phones
This section is only applicable to CP960 IP phones.
Procedures:
1. Reconnect the PoE adapter.
2. Long tap the Home touch key when the touch screen prompts “Initializing…” to trigger the recovery
mode.
The IP phone will read and upgrade the firmware from the USB flash drive, and the touch screen
prompts “Firmware Updating”.
When upgrading successfully, the touch screen prompts “Initializing”.
3. If the IP phone fails to upgrade, the LCD screen will indicate the failure. You need to check and make
sure:
 The file system of the USB flash drive should be FAT32.
 The USB flash drive has been successfully connected to the IP phone.
 The resource files are correctly renamed and placed on the USB flash drive.
 Repeat the recovery mode procedures to try again.
The LCD screen prompts “Update failed (-1)” when failing to upgrade:
4. Tap Settings->General to verify the current firmware version after upgrading successfully.
…. Update failed (-1) ….

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