System information

signals in the audio channel triggered by the users dialing the required digits on their
dialpads).
*
Transfers on SIP channels (for example from a SIP telephone) can be handled using the
capabilities of the phone itself, and won’t be affected by anything in the features.conf
file.
The [general] section
In the [general] section of features.conf, you can define options that fine-tune the be-
havior of the park and transfer features in Asterisk. These options are listed in
Table 11-1.
Table 11-1. features.conf [general] section
Option Value/Example Notes
parkext 700 Sets the default extension used to park calls.
parkpos 701-720 Sets the range of extensions used as the parking lot. Parked calls may
be retrieved by dialing the numbers in this range.
context parkedcalls Sets the default dialplan context where the parking extension and the
parking lot extensions are created.
parkinghints no Enables/disables automatic creation of dialplan hints for the parking lot
extensions so that phones can subscribe to the state of extensions in the
parking lot. The default is no.
parkingtime 45 Specifies the number of seconds a call will wait in the parking lot before
timing out.
comebacktoorigin yes Configures the handling of timed-out parked calls. For more information
on the behavior of this option, see the sidebar titled “Handling Timed-
Out Parked Calls with the comebacktoorigin Option” on page 224.
courtesytone beep Specifies the sound file to be played to the parked caller when the parked
call is retrieved from the parking lot.
parkedplay caller Indicates which side of the call to play the courtesytone to when a
parked call is picked up. Valid options include callee, caller,
both, or no. The default is no.
parkedcalltransfers caller Controls which side of a call has the ability to execute a DTMF-based
transfer in the call that results from picking up a parked call. Valid options
include callee, caller, both, or no. The default is no.
parkedcallreparking caller Controls which side of a call has the ability to execute a DTMF-based park
in the call that results from picking up a parked call.
a
Valid options include
callee, caller, both, or no. The default is no.
* Yes, we realize that a SIP INFO message is in fact a SIP message, and is not technically part of the audio
channel, but the point is that you can’t use the “transfer” or “park” button on your SIP phone to access
these features while on a call. You’ll have to send DTMF.
222 | Chapter 11: Parking and Paging