.. _plar_(hotdial):

PLAR (Hotdial): Overview
------------------------

The Private Line Automatic Ringdown (PLAR) feature, also called Hotdial,
automates the Unified CM configuration required to set up PLAR for a
phone. The PLAR feature provides an administrator with a single interface
and workflow for the management of the following elements of Unified CM:

* RoutePartition
* CSS
* TransPattern
* Phone
* Line
* SIP Dial Rule

The feature further provides an administrator with:

* A simplified user interface to select a Phone that must be enabled for
  PLAR, a destination number, and the destination CSS.
* The orchestration of a workflow to create the necessary Unified CM
  partition, CSS, Translation Pattern, and so on, and to apply these to
  the relevant Phone and Number.

To configure an existing phone for Hotdial, the user selects a
pre-existing device and indicates that the device is a Hotdial device.

As soon as a PLAR configured phone goes off hook (or the NewCall softkey
or line key gets pressed), the phone immediately dials a pre-configured
destination number. The phone cannot dial any other number except the
Hotdial destination that gets configured for PLAR.

The PLAR configuration can be added or deleted, but not modified.