Yealink SIP-T27G Administrator's Guide

Troubleshooting Methods
548
Network Reachability Detection Configuration
The following table lists the parameters you can use to configure network reachability detection.
Parameter
static.features.network_test.enable <y0000000000xx>.cfg
Description
It enables or disables the network reachability detection.
Permitted
Values
0-Disabled
1-Enabled, if the network is unreachable, "Network unreachable" is displayed on the
T42S/T42U/T41S phones, while a network unreachable icon is displayed in the status bar of other
phones.
Default
0
Supported
Devices
All phones except T48G, T46G, T42G, T41P and T29G
Parameter
static.features.network_test.host <y0000000000xx>.cfg
Description
It configures the server address that the phone uses to detect the network reachability.
The server address can be the IP address or domain name. Multiple server addresses are separated
by semicolons.
Example:
static.features.network_test.host = 192.168.1.20;192.168.1.10
Note: It works only if "static.features.network_test.enable" is set to 1 (Enabled).
Permitted
Values
Blank-The phone does not detect network reachability.
String within 1024 characters
Default
Blank
Supported
Devices
All phones except T48G, T46G, T42G, T41P and T29G
Parameter
static.features.network_test.check_policy <y0000000000xx>.cfg
Description
It configures the policy when detecting the network reachability of multiple servers.
Note: It works only if "static.features.network_test.enable" is set to 1 (Enabled).
Permitted
Values
0-OR
1-AND
Default
0
Supported
Devices
All phones except T48G, T46G, T42G, T41P and T29G
Parameter
static.features.network_test.period <y0000000000xx>.cfg
Description
It specifies a period of time (in seconds) to detect the network status when the network is reachable.
Note: It works only if "static.features.network_test.enable" is set to 1 (Enabled).
Permitted
Values
Integer from 2 to 3600
Default
60
Supported
All phones except T48G, T46G, T42G, T41P and T29G

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