Yealink SIP-T19 E2 T4 Series, Administrator'S Manual

Page: 317 / 981

Configuring Basic Features
295
Parameters Permitted Values Default
The IP phone tries to send the INVITE request to each emergency server for three times.
Example
:
dialplan.emergency.1.server_priority = 2, 1, 3
It means the IP phone sends the INVITE request to the emergency server 2 first. If the
emergency server 2 does not respond correctly to the INVITE, then tries to make the call
using the emergency server 1. If the emergency server 1 does not respond correctly to the
INVITE, then tries to make the call using the emergency server 3. The IP phone tries to send
the INVITE request to each emergency server for three times.
Note
: If the IP address of the emergency server with higher priority has not been configured,
the emergency server with lower priority will be used. If the account is registered
successfully or failed (the account information has been configured), the emergency calls will
be dialed using the following priority: SIP server>emergency server; if the account is not
registered, the emergency server will be used.
Web User Interface:
None
Phone User Interface:
None
Hotline
Hotline, sometimes referred to as hot dialing, is a point-to-point communication link in which a
call is automatically directed to the preset hotline number. The IP phone automatically dials out
the hotline number using the first available line after a specified time interval when you lift the
handset, press the Speakerphone key or the line key. IP phones only support one hotline
number.
It works only if the Off Hook Hot Line Dialing feature is disabled. For more information, refer to
Off Hook Hot Line Dialing on page 297 .
Procedure
Hotline can be configured using the following methods.
Central Provisioning
(Configuration File)
<y0000000000xx>.cfg
Configure the hotline number.
Parameter:
features.hotline_number
Specify the time the IP phone waits
before automatically dialing out the
hotline number.
Parameter:
features.hotline_delay