which the call was parked, and the phone will hang up. One may then use the phone's Parking application to browse and directly retrieve a
parked call.
features.conf
Asterisk enables call parking by default with the features.conf parameters:
Features Configuration Example for Parking Application
parkext => 700 ; The extension to dial to park calls
parkpos => 701-720 ; The extensions onto which calls are parked
context => parkedcalls ; The default parking lot context
res_digium_phone.conf
The corresponding res_digium_phone.conf configuration parameters are:
Digium Phones Configuration Example for Parking Application
parking_exten=700 ; The extension to program the phone to dial when a call is parked using the park
softkey
parking_transfer_type=blind ; The type of parking to perform, blind or attended.
BLF Subscription to a Parking slot
BLF keys on phones are commonly tied to slots in Parking Lots, such that when a caller is waiting in a particular slot, e.g. 701, the lamp for a BLF
tied to that parking slot is lit and the user may press the BLF button to retrieve the parked call from the lot.
Tying the status of a BLF lamp to the activity of a parking slot does not require setting the parking_exten, but it does require enabling Asterisk's
parking feature, as well as a proper dialplan hint and a proper subscription URI on the Digium phone.
If parking_exten is not configured for a Digium phone, then the DPMA will not enable the one-touch parking feature of the
Digium phone.
Dialplan hint
An example dialplan hint for watching status of a parking slot is:
Remember to include the context to which calls are parked into the same dialplan context as the Digium phone, as well as the
Hint
Dialplan Example for Parking slot Hint
include => parkedcalls
exten => 701,hint,park:701@parkedcalls
Contacts subscribe_to URI
An example contacts XML file subscribe_to URI for watching parking slot 701:
Contacts Subscription URI for parking slot 701
subscribe_to="sip:[email protected]"
User Presence
When used with the DPMA, Digium Phones are capable of seeing both device status and user presence. Device status is simply the device state
one can subscribe to over SIP SUBSCRIBE, that maps directly to a hint in the diaplan. User presence is an entirely new concept to Asterisk, and
expands upon the usage of dialplan hints, allowing them to represent both device state and user presence at the same time. Digium Phones not
