Yealink SIP-T27G Administrator's Guide

Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series/CP920 IP Phones
144
Handset Firmware Upgrade Configuration
The following table lists the parameters you can use to upgrade handset firmware.
Parameter
over_the_air.url <y0000000000xx>.cfg
Description
It configures the access URL of the handset firmware file.
Note: The priority of parameter “over_the_air.url” is lower than “over_the_air.url.w56h”/over_the_air-
.url.w53h/“over_the_air.url.w52h”.
Permitted
Values
URL within 511 characters
Default
Blank
Web UI
Settings > Upgrade > Select and update handset firmware.
Parameter
over_the_air.url.w56h <y0000000000xx>.cfg
Description
It configures the access URL of the W56H handset firmware file.
Note: The priority of parameter “over_the_air.url.w56h” is higher than “over_the_air.url”.
Permitted
Values
URL within 511 characters
Default
Blank
Parameter
over_the_air.url.cp930w <y0000000000xx>.cfg
Description
It configures the access URL of the CP930W phone firmware file.
Note: The priority of parameter “over_the_air.url.cp930w” is higher than “over_the_air.url”.
Permitted
Values
URL within 512 characters
Default
Blank
Parameter
over_the_air.handset_tip <y0000000000xx>.cfg
Description
It enables or disables to pop up a tip when upgrading the handset firmware from the provisioning
server.
Note: It works only if “over_the_air.base_trigger” and “over_the_air.handset_trigger” are set to 0 (Dis-
abled).
Permitted
Values
0-Disabled
1-Enabled, the handset will pop up the message “Handset has a new firmware, update now?”.
Default
1
Supported
Devices
All handsets except DD phones
Parameter
over_the_air.handset_trigger <y0000000000xx>.cfg
Description
It enables or disables to upgrade the handset firmware compulsively when the handset is registered
to a phone or turned on successfully.
It is only applicable when the current handset firmware is different from the one on the provisioning
server.
Permitted
Values
0-Disabled, if “over_the_air.handset_tip” is set to 1 (Enabled), it will pop up a tip on the handset to
notify the user of firmware upgrade. If “over_the_air.handset_tip” is set to 0, you may go to Settings >
Upgrade Firmware on the handset to trigger the upgrading manually.
1-Enabled, it will upgrade the handset firmware compulsively without a pop-up tip on the handset.

Yealink SIP-T27G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black, Gold
Wall mountable	Yes
Display diagonal	3.66 \
Display resolution	240 x 120 pixels
RJ-9 ports quantity	2
USB 2.0 ports quantity	1
Voice codecs	CNG, G.711, G.722, G.723.1, G.726, G.729, G.729ab, VAD, iLBC
Dual-Tone Multi-Frequency (DTMF) modes	SIP info
Lines quantity	8 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	6
Bluetooth	-
Security algorithms	AES, MD5
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Volume control	Digital
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	210 mm
Width	265 mm
Height	170.5 mm