Yealink SIP-T40G User Manual

User Guide for T4 Series IP Phones
66
Unlocking the Phone
Procedure:
1. Press any locked key, the LCD screen prompts you to enter an unlock PIN.
On the SIP-T48S/T48G IP phone, press any locked key or tap the touch screen.
2. Enter the desired PIN in the Unlock PIN field.
3. Press OK.
The lock icon disappears from the LCD screen.
You can long press the # key or wait for a period of time (if configured) to lock the phone
again.
Note
Deactivating the Phone Lock
Procedure:
1. Navigate to Menu->Basic->Phone Lock.
For the SIP-T42S/T42G/T41S/T41P/T40G/T40P IP phone, navigate to
Menu->Settings->Basic Settings->Phone Lock.
2. Enter the desired PIN (default PIN: 123) in the Unlock PIN field, and then press OK.
For the SIP-T48S/T48G IP phone, tap Save.
3. Select Disabled from the Lock Enable field.
You can also unlock the phone by administrator password. When you enter the administrator
password to unlock the phone, the phone will turn to the Change PIN screen.
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Yealink SIP-T40G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Wall mountable	Yes
Wi-Fi	No
Security algorithms	AES, HTTPS, SSL/TLS
Networking standards	IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	FTP, TFTP, HTTP, HTTPS
Voice codecs	G.711, G.711a, G.711u, G.722, G.726, G.729ab
RJ-11 ports quantity	1
Ethernet LAN (RJ-45) ports	2
AC adapter input voltage	100 - 240 V
AC adapter output current	0.6 A
AC adapter output voltage	5 V
Power consumption (typical)	1.6 W
Certification	CE, FCC, ISO 9001
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 90 %
Volume control	Digital
Display diagonal	2.3 \
Display resolution	132 x 64 pixels
Lines quantity	3 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	3
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	175 mm
Width	212 mm
Height	54 mm