OBi1000 User Guide
Copyright Obihai Technology
40
5
Premium Features at a Glance
The features in this section have special requirements on the soft switch or PABX that provides the services. The
availability and operation of these features may depend on the particular service provider soft switch or office PABX
in use and how it is set up. Here we only discuss feature functionalities and common behavior generically. Please
consult your local phone administrator to get the details and availability of these features at your location.
Busy Lamp Field (BLF)
Busy Lamp Field (BLF) is a common collaborative feature for a group of users to monitor calls on one or more
extensions. The detection and notification of events occurring at the monitored extension are carried out by the soft
switch or PABX.
When the BLF service is available with a specific voice service, the BLF function can be assigned to a feature key
bound to that voice service to monitor an extension that is also on that voice service. We refer to a feature key that
is assigned the BLF function as a
“
BLF key
”
. One BLF key monitors one extension only. Your phone administrator can
assign as many BLF Keys as there are feature keys available, to monitor as many extensions. The following table lists
the typical events that are monitored with a BLF Key. The table also shows the operation that can be invoked when
the respective event occurs and the LED pattern indicating that particular event. Two or more events may be
happening at the same time at the monitored extension, for example, the monitored extension may be connected
on a call (hence Busy) plus have a ringing call and a holding call at the same time. The LED pattern can only show
one event at a time.
The OBi treats a BLF key-press as pressing a speed dial to call the monitored extension regardless if any event is
taking place at the monitored extension. To carry out another BLF event-dependent operation, the user must invoke
the corresponding feature key item on the screen and select the appropriate soft key option. The feature key item
also provides more details of each event, such as the caller ID of the remote party.
Table 6: List of all BLF states
Icon
BLF Event
Description
Available Operation
LED Pattern
Ringing
Monitored extension
is ringing
Answer the call. This operation is
known as
Directed Call Pickup.
Fast blinking
red
Busy
Monitored extension
is on a call or making a
call
Barge in to either a) fully participate
in the call or conference, or b) listen
to the conversation without talking,
or c) listen to the conversation but
talk only to the monitored extension
(a.k.a. coaching or whispering).
There can be other variations along
these lines.
Steady red
Holding
Monitored extension
is holding one or more
calls
Resume and take over the call
Slow blinking
red
Call
Parked
A call is parked against
the monitored
extension
Pick up the call from the parking slot
Periodic short
blink in red
Idle
Monitored extension
is idle
Make or transfer a call to the
extension
Steady green
Offline
Monitored extension
is offline
Steady Amber
