Yealink SIP-T27G Administrator's Guide

Configuration Parameters
531
Default
1
Parameter
sip.sdp_early_answer_or_offer <y0000000000xx>.cfg
Description
It enables or disables the phone to generate an SDP Offer or Answer message when receiving a reli-
able provisional response or PRACK request and response.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter
sip.reliable_protocol.timerae.enable <y0000000000xx>.cfg
Description
It enables or disables the timer for ict and nict when TCP protocol is used.
Note: This parameter can be used for fast failover purpose when TCP connection fails.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Parameter
sip.mac_in_ua <y0000000000xx>.cfg
Description
It enables or disables the phone to carry the MAC address information in the User-Agent header.
Permitted
Values
0-Disabled
1-Enabled, the phone will carry the MAC address with colons (for example 00:15:65:7f:fb:7e) in the
User-Agent header.
2-Enabled, the phone will carry the MAC address without colons (for example 0015657ffb7e) in the
User-Agent header.
Default
0
[1]
X is the account ID. For T57W/T54W/T48U/T48S/T48G/T46U/T46S/T46G/T29G, X=1-16; for
T53W/T53/T43U/T42G/T42U/T42S, X=1-12; for T41P/T41S/T27G, X=1-6; for T40P/T40G/T23P/T23G, X=1-3; for T21
(P) E2, X=1-2; for T19(P) E2/CP920, X=1.
[2]
If you change this parameter, the phone will reboot to make the change take effect.
Call Settings Parameters
Parameter
phone_setting.show_code403 <y0000000000xx>.cfg
Description
It configures the display message on the phone screen when receiving a 403 message.
If it is left blank, the phone will display the value sent from the server when receiving the 403 mes-
sage.
Permitted
Values
String within 99 characters
Default
Blank
Parameter
phone_setting.incoming_call_when_dial-
ing.priority
<y0000000000xx>.cfg
Description
It enables or disables the phone to interrupt the user operation when there is an incoming call.
Permitted
Values
0-Disabled, the phone will not prompt the incoming call information when the user is dialing or select-
ing a contact from the directory/call log lists to transfer a call/to set up a conference/to place a new
call.
1-Enabled, the phone will return to the dialing screen if there is an incoming call arrives when the
user selects a contact from the directory/call log lists to transfer a call/to set up a conference with/to

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