Yealink SIP-T27G Auto Provisioning Guide

Yealink IP Phones Auto Provisioning Guide
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Why is the permission denied when uploading files to the root directory of the FTP server?
 Ensure that the complete path to the root directory of the FTP server is authorized.
 Check security permissions on the root directory of the FTP server, if necessary, change the
permissions.
Why doesn’t the IP phone obtain the IP address from the DHCP server?
 Ensure that settings are correct on the DHCP server.
 Ensure that the IP phone is configured to obtain the IP address from the DHCP server.
Why doesn’t the IP phone download the ring tone?
 Ensure that the file format of the ring tone is *.wav.
 Ensure that the size of the ring tone file is not larger than that the IP phone supports.
 Ensure that the properties of the ring tone for the IP phone are correct.
 Ensure that the network is available and the root directory is right for downloading.
 Ensure that the ring tone file exists on the provisioning server.
Why doesn’t the IP phone update configurations?
 Ensure that the configuration files are different from the last ones.
 Ensure that the IP phone has downloaded the configuration files.
 Ensure that the parameters are correctly set in the configuration files.
 Ensure that the value of the parameter “static.auto_provision.custom.protect” is set to 0. If it
is set to 1, the provisioning priority is shown as follows: phone/web user interface >central
provisioning >factory defaults. A setting you make using a lower-priority method does not
apply to or override a duplicate setting made using a higher-priority method.
For more information, refer to the latest Administrator Guide for your phone on Yealink
Technical Support.

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