Yealink SIP-T27G Administrator's Guide

Phone Provisioning
88
Note: If the phone performs auto provisioning when receiving a SIP NOTIFY message which contains
the header “Event: check-sync”, the phone will display the prompt message no matter whether the con-
figuration is updated.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter
static.auto_provision.connect.keep_alive <y0000000000xx>.cfg
Description
It enables or disables the long connection for downloading files via auto provisioning.
Permitted
Values
0-Disabled, the phone uses the short connection for downloading files via auto provisioning
1-Enabled
Default
0
Parameter
static.auto_provision.authentication.expired_time <y0000000000xx>.cfg
Description
It configures the timeout (in seconds) after which the authentication pop-up box for auto provisioning
disappears.
Permitted
Values
0-The authentication pop-up box does not disappear from the phone screen automatically.
Integer from 10 to 86400 -The authentication pop-up box automatically disappears from the phone
screen after the designated time.
Default
7200
Parameter
static.auto_provision.dns_resolv_nosys <y0000000000xx>.cfg
Description
It enables or disables the phone to resolve the access URL of the provisioning server using download
libraries mechanism.
Permitted
Values
0-Disabled, the phone resolves the access URL of the provisioning server using the system mech-
anism.
1-Enabled
Default
1
Supported
Devices
T42G, T41P, CP920
Parameter
static.auto_provision.dns_resolv_nretry <y0000000000xx>.cfg
Description
It configures the retry times when the phone fails to resolve the access URL of the provisioning server.
Note: For each different DNS server, it works only if “static.auto_provision.dns_resolv_nosys" is set to
1 (Enabled).
Permitted
Values
Integer from 1 to 10
Default
2
Parameter
static.auto_provision.dns_resolv_timeout <y0000000000xx>.cfg
Description
It configures the timeout (in seconds) for the phone to retry to resolve the access URL of the pro-
visioning server.
Note: For each different DNS server, it works only if “static.auto_provision.dns_resolv_nosys" is set to
1 (Enabled).
Permitted
Values
Integer from 1 to 60
Default
5

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