Yealink SIP-T27G Administrator's Guide

Account Settings
302
Values 1-Successive registration
Default
0
Parameter
account.X.fallback.timeout
[1]
<MAC>.cfg
Description
It configures the time interval (in seconds) for the phone to detect whether the working server is avail-
able by sending the registration request after the fallback server takes over call control.
Note: It is not applicable to outbound proxy servers.
Permitted
Values
Integer from 10 to 2147483647
Default
120
Parameter
account.X.outbound_proxy_fallback_interval
[1]
<MAC>.cfg
Description
It configures the time interval (in seconds) for the phone to detect whether the working outbound proxy
server is available by sending the registration request after the fallback server takes over call control.
Note: It is only applicable to outbound proxy servers.
Permitted
Values
Integer from 0 to 65535
Default
3600
Web UI
Account > Register > Proxy Fallback Interval
Phone UI
Color Screen Phones:
Menu > Advanced (default password: admin) > Accounts > Account X > Proxy Fallback Interval
Black-and-white Screen Phones:
Menu > Settings > Advanced Settings > Accounts > Proxy Fallback Interval
Parameter
account.X.redundancy_with_reg_fail.enable
[1]
<MAC>.cfg
Description
It enables or disables the phone to send the request to the next server when failing to register an
account.
Note: It works only if “account.X.fallback.redundancy_type" is set to 1 (Successive registration).
Permitted
Values
0-Disabled. Only if the working server does not respond, will the IP phone send the request to the next
server.
1-Enabled
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.
Failover Server Redundancy Configuration
The following table lists the parameters you can use to configure failover server redundancy.
Parameter
account.X.sip_server.Y.register_on_enable
[1][2]
<MAC>.cfg
Description
It enables or disables the phone to send registration requests to the secondary server when encoun-
tering a failover.
Permitted
Values
0-Disabled, the phone will not attempt to register to the secondary server, since the phone assumes
that the primary and secondary servers share registration information. So the phone will directly send
the requests to the secondary server.
1-Enabled, the phone will register to the secondary server first, and then send the requests to it.

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