Yealink SIP-T40G Administrator's Guide

Account Settings
304
DNSTTL on the registered server expires, the phone will retry to send requests to the primary server.
2-Registration: the phone will send requests to the last registered server first. If the registration
expires, the phone will retry to send requests to the primary server.
3-duration: the phone will send requests to the last registered server first. If the time defined by the
“account.X.sip_server.Y.failback_timeout” parameter expires, the phone will retry to send requests to
the primary server.
Default
0
Parameter
account.X.sip_server.Y.failback_timeout
[1][2]
<MAC>.cfg
Description
It configures the timeout (in seconds) for the phone to retry to send requests to the primary server after
failing over to the current working server.
If you set the parameter to 0, the phone will not send requests to the primary server until a failover
event occurs with the current working server.
If you set the parameter between 1 and 59, the timeout will be 60 seconds.
Note: It works only if “account.X.sip_server.Y.failback_mode” is set to 3 (duration).
Permitted
Values
0, Integer from 60 to 65535
Default
3600
Parameter
account.X.sip_server.Y.failback_subscribe.enable
[1][2]
<MAC>.cfg
Description
It enables or disables the phone to retry to re-subscribe after registering to the secondary server with
different IP addresses when encountering a failover.
Note: It works only if "account.X.sip_server.Y.failback_mode" is set to 1, 2 or 3.
Permitted
Values
0-Disabled
1-Enabled, the phone will immediately re-subscribe to the secondary server, for ensuring the normal
use of the features associated with the subscription (for example, BLF, SCA).
Default
0
Parameter
account.X.outbound_proxy.Y.register_on_enable
[1][2]
<MAC>.cfg
Description
It enables or disables the phone to register to the secondary outbound proxy server before sending
requests to it when encountering a failover.
Permitted
Values
0-Disabled, the phone will not attempt to register to the secondary outbound proxy server, since the
phone assumes that the primary and secondary outbound proxy servers share registration inform-
ation. So the phone will directly send the requests to the secondary outbound proxy server.
1-Enabled, the phone will register to the secondary outbound proxy server first, and then send the
requests to it.
Default -1, the phone will invoke “account.X.sip_server.Y.register_on_enable” to take effect.
Parameter
account.X.outbound_proxy.Y.retry_counts
[1][2]
<MAC>.cfg
Description
It configures the retry times for the phone to resend requests when the outbound proxy server Y is
unavailable or there is no response from the outbound proxy server Y.
The phone moves to the next available outbound proxy server after three failed attempts.
Permitted
Values
Integer from 0 to 20
Default -1, the phone will invoke “account.X.sip_server.Y.retry_counts” to take effect.
Parameter
account.X.outbound_proxy.Y.only_signal_with_registered
[1][2]
<MAC>.cfg

Yealink SIP-T40G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Wall mountable	Yes
Wi-Fi	No
Security algorithms	AES, HTTPS, SSL/TLS
Networking standards	IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	FTP, TFTP, HTTP, HTTPS
Voice codecs	G.711, G.711a, G.711u, G.722, G.726, G.729ab
RJ-11 ports quantity	1
Ethernet LAN (RJ-45) ports	2
AC adapter input voltage	100 - 240 V
AC adapter output current	0.6 A
AC adapter output voltage	5 V
Power consumption (typical)	1.6 W
Certification	CE, FCC, ISO 9001
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 90 %
Volume control	Digital
Display diagonal	2.3 \
Display resolution	132 x 64 pixels
Lines quantity	3 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	3
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	175 mm
Width	212 mm
Height	54 mm