OBi1000 User Guide
Copyright Obihai Technology
42
Shared Line Appearance (SLA) and Shared Call Appearance (SCA)
A Shared Line is a service account or extension that is installed on a group of phones, such that if any phone is using
that extension, other sharing phones will be notified. There can be multiple simultaneous calls on a shared line. The
maximum allowed simultaneous calls on a shared line will typically be fixed. Each call on a shared line is called a
Share Call Appearance (SCA) and is sometimes referred to as a Bridged Line Appearance (BLA). If your phone has a
shared line configured as one of the services, it should have as many Call Keys defined on the phone as are bound to
that service. SCAs of a shared line are ordered with an index 1
–
n
as SCA1, SCA2, SCA3, ... SCA
n
, where
n
is the
maximum number of calls permitted for that line. On the OBi1000, the SCAs are assigned sequentially in ascending
order according to the VLK index of the corresponding Call Key bound to the shared line. For example, suppose a
shared line with 4 SCAs is configured on a phone with VLK1, VLK3, VLK7, and VLK8 assigned as the 4 Call Keys bound
to that line, then the calls hosted on VLK1, VLK3, VLK7, and VLK8 are SCA1, SCA2, SCA3, and SCA4, respectively.
Table 7: List of all SCA states
Icon
SCA State
Description
Available Operation
LED Pattern
Seized
A sharing phone has seized
the SCA to make an
outgoing call
Blinking in red
(30ms on/30ms
off)
Trying
A sharing phone is trying an
outgoing call
Steady red
Proceeding
A sharing phone is making
an outgoing call and the
called party is ringing
Steady red
Connected
A sharing phone is on a
connected call with that
SCA
Barge In to monitor the
conversation only or to fully
participate in the
conversation
Steady red
Held
A sharing phone is on a call
with that SCA and has
placed the call on hold
Resume and take over the
call
Slow blinking in
red
Private Held
A sharing phone is on a call
with that SCA and has
placed the call on private
hold
Slow blinking in
red
(100ms on/100ms
off)
Call Parked
A call is parked against the
extension
Pickup the parked call
Blinking in red
(50ms on/50ms
off)
Idle
None of the sharing phones
is using the SCA
Seize the SCA to make an
outgoing call
Off
Error
Protocol error
Steady amber
Intercom Calls
Intercom refers to a call with the following characteristics:
The called phone answers automatically, usually immediately without ringing and uses the speakerphone
or headset to answer the call. Typically the answering phone also plays a short beep to alert the called user
right after answering the call
The calling phone may support Push To Talk (PTT) such that the call ends as soon as the caller releases the
respective PTT key on the calling phone. PTT does not apply to the called phone on the other hand; the
called user talks and ends the call normally just like any other call
When an intercom call is received and answered, all other current calls on the called phone will be interrupted in
the standard way, as this is a new call to be added to the foreground. With the OBi, a feature key may be assigned
