Yealink SIP-T27G Administrator's Guide

Call Features
368
3-DNS-NAPTR
Default
0
Parameter
dialplan.emergency.X.value
[2]
<y0000000000xx>.cfg
Description
It configures the emergency number to use on your phones so a caller can contact emergency ser-
vices in the local area when required.
Note: It works only if “dialplan.emergency.enable” is set to 1 (Enabled) and “dial-
plan.emergency.asserted_id_source” is not set to HELD.
Permitted
Values
Number or SIP URI
Default
When X = 1, the default value is 911;
When X = 2-255, the default value is Blank.
Parameter
dialplan.emergency.X.server_priority
[2]
<y0000000000xx>.cfg
Description
It configures the priority of which the emergency servers to be used first.
Multiple values are separated by commas. The servers to be used in the order listed (left to right).
The IP phone tries to make emergency calls using the emergency server with higher priority, and then
with lower priority. The IP phone tries to send the INVITE request to each emergency server three
times.
Note: If the account information has been configured (no matter whether the account registration suc-
ceeds or fails), the emergency calls will be dialed using the following priority: SIP server > emergency
server; if not, the emergency server will be used. It works only if “dialplan.emergency.enable” is set to
1 (Enabled). And “dialplan.emergency.asserted_id_source” is not set to HELD.
Permitted
Values
a combination of digits 1, 2 and 3
Default
1, 2, 3
Parameter
dialplan.emergency.held.server_url <y0000000000xx>.cfg
Description
It configures the primary Location Information Server URL for the phone to send HELD location
request.
Note: It works only if “dialplan.emergency.enable” is set to 1 (Enabled) and “dial-
plan.emergency.asserted_id_source” is set to HELD.
Permitted
Values
String
Default
Blank
Parameter
dialplan.emergency.held.secondary.server_url <y0000000000xx>.cfg
Description
It configures the secondary Location Information Server URL for the phone to send HELD location
request.
Note: It works only if “dialplan.emergency.enable” is set to 1 (Enabled) and “dial-
plan.emergency.asserted_id_source” is set to HELD.
Permitted
Values
String
Default
Blank
Supported
Devices
All phones except T48G, T46G, T42G, T41P and T29G
Parameter
dialplan.emergency.held.request_type <y0000000000xx>.cfg

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