Copyright 2010-2017 Obihai Technology, Inc.
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phone to handle multiple simultaneous calls scenarios such as call waiting and conference calls. If there is a new
incoming call but no more Call Keys to assign the call to, it will receive the busy treatment.
A Call Key may be configured as
bound
to a specific Voice Service account (such as SP1) installed on the phone, or
unbound
to any service. A Bound Call Key is used to handle calls on the bound service account only, while an Unbound
Call Key can handle calls on any service account. For incoming calls, the phone automatically assigns the call to an open
Call Key. It first attempts to find a Call Key that is bound to the service account where the incoming call is on. If none is
found, it then tries to look for an unbound call key to assign the call to. If none is found, the call is rejected with busy
treatment.
A Call Key may be “overloaded” with up to four calls. The number of calls to overload on a Call Key is controlled by the
MaxCall
parameter. When the key is overloaded, the LED pattern and the key display reflects the states of only one
of the calls at any time; this call is referred to as the call-in-focus. The call-in-focus is selected by the phone
automatically according to the following:
•
The latest Ringing call; if multiple available, the latest one
•
The latest Holding call
•
The latest Call in other states
A user can also force a call to be the call-in-focus from the GUI. The operation triggered by pressing the Call Key applies
to the call-in-focus only according to its current state.
Line Monitor Keys
Not to be confused with a line key, a line monitor key monitors the status a line, whether it is up or down, has calls
ringing, holding or connected. Pressing the key may result in:
•
Answer an incoming call if there is one. If there are more than one, answer the oldest one
•
Start dial tone, if there are spare capacity
Speed Dial Keys
The Speed Dial function lets the user configure a speed dial number from the phone GUI. User can press and hold down
the speed dial key until the feature key item shows up on the screen. From there the user can configure the speed dial
details. The service to use for calling with the speed dial may also be configured. This function supports the Push to Talk
PTT option.
Note: There are in addition to the spee dial feature keys 99 configurable speed dial numbers that may be invoked by
dialing the corresponding 1-2-digit speed dial code (that is, 1
–
99) like a regular number. These 99 speed dial storages
are referred to as the “
Speed Dials 99
” feature that
is entirely independ of the speed dial feature keys discussed here.
BLF Keys
BLF or Busy Lamp Field is described in detail in a later section. A BLF key is used to monitor the call status of another
extension. This feature operates in the context of an SP service. In many cases the BLF key also acts as a speed dial key
to call or transfer a call to the monitored extension. This key also supports PTT when it is used to call the monitored
extension. Note that the call or call transfer to the monitored extension will use the same underlying SP service.
Call Park Monitor Keys
CPM or Call Park Monitor is very similar to BLF, except each key monitors a parking lot orbit instead of another user
extension. It only indicates the status whether a call is parked on the orbit or not. Pressing the key once to either park
the highlighted call on screen to the orbit if it is not occupied, or retrieve the call from the orbit if it is currently
occupied.
