13.1.24 PS (Portable Station)
 PS Termination
Each PS can be registered to more than one PBX if necessary, and registration can be canceled if a PS
will no longer be used with one of these PBXs.
3.34 [1-2] Portable Station—PS Registration and De-registration—
 Personal Identification Number (PIN) for PS Registration
There are two ways a PS can be used.
As an Extension
A PS is assigned its own extension number when it is registered to a PBX. The PS can use this
extension number to make and receive calls, just as a wired telephone can. A PS can be a member of
an incoming call distribution (ICD) group, can be assigned as the destination for redirected calls, etc.,
just as a wired telephone can.
A PS can also be a member of a PS ring group (® 13.1.28 PS—Ring Group). A PS ring group is a
way for several PSs to be notified of an incoming call simultaneously, but does not offer all of the
features provided by an ICD group. (® 9.1.1 ICD GROUP FEATURES)
In Wireless XDP Parallel Mode
A PS can share an extension number with a wired telephone, allowing extension users to use their
PSs when they are away from their desks to answer or make calls as if they were using their wired
telephones. (® 20.1.4 Wireless XDP Parallel Mode)
PS Interaction with CS
Each PS communicates with the PBX wirelessly through a cell station (CS). Each CS is connected to the
PBX and sends and receives radio waves to and from different PSs within its range, using different channels
for different PSs.
A PS must be within range of a CS in order to be used, however, multiple CSs can be used with the same
PBX to offer a greater area of wireless coverage. Additionally, a PS does not need to be used with a specific
CS; any PS can communicate with any CS provided the PS is registered to the PBX, and provided the CS
has at least one channel available.
If a PS is within range of more than one CS, the PS will communicate with the CS which has the greatest signal
strength and an available channel. When a PS user moves out of range of one CS and moves in range of
another CS, the PS will "hand over" its communications to the new CS. Handover is possible when:
The PS is on an intercom call or on a call with an outside party. (The call will not be disconnected during
A call is ringing at the PS. (The call will continue to ring after the handover.)
The PS is in idle status (i.e., waiting to receive calls).
[Example of Handover]
Handover is not possible when the PS is:
Not within range of another CS.
Within range of another CS but that CS is busy.
Call is not disconnected
Document Version 2010-11