5.2.4 Portable Station (PS) Features
5.2.4.1 Portable Station (PS) Connection
Description
This PBX supports the connection of a PS. Cell Stations (CSs) allow PSs to receive reception within a
designated area. It is possible to use the PBX features using the PS like a PT.
Conditions
• For details specific to SIP-based CSs and PSs, see "5.2.2.2 SIP Portable Station (S-PS) and SIP Cell
Station (SIP-CS)".
• The PS registration is required through the system programming. To avoid unexpected registration to
another PBX, the Personal Identification Number
(PIN) for the PBX is necessary to register a PS. The
registration can be cancelled.
• Handover
Even if a PS user moves during a conversation, the PS will automatically switch between cells without
disconnecting the call (Handover).
Handover is available in any of the following cases:
a. During a conversation with an extension or outside party.
b. While a call is ringing at the PS.
c. While the PS is in idle status.
PBX
CS
Handover:
Calls will not be
disconnected.
CS
CS
Interface
However, Handover is not available in any of the following cases:
a. When the new (Handover) CS is busy.
b. When there is no CS within range.
c. While the Live Call Screening
(LCS) is activated (® 3.2.2.16 Live Call Screening (LCS)).
d. While the PS user is paging other extensions (® 2.17.1 Paging).
e. While the PS user is dialling digits to make a trunk call.
f. If one CS is a SIP-CS and the other is not (e.g., an IP-CS).
• DSP Resource Usage
Making a call through an IP-CS with a PS requires a certain number of DSP resources, depending on the
codec used. If all DSP resources are in use, this operation cannot be performed. To ensure a minimum
level of performance, DSP resources can be reserved for VoIP communication. (® 5.5.4 DSP Resource
Usage)
• When a caller has dialled the extension number of a PS but the CS is busy, the caller hears a busy tone.
• For more information about connecting PSs to CSs, see the Quick Installation Guide for the relevant CS.
• The number of digits allowed for a PS extension number is determined by the PS model. See your PS
documentation for details.
Feature Guide 501
5.2.4 Portable Station (PS) Features