5.2.4 Portable Station (PS) Features5.2.4.1 Portable Station (PS) ConnectionDescriptionThis PBX supports the connection of a PS. Cell Stations (CSs) allow PSs to receive reception within adesignated 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 CellStation (SIP-CS)".• The PS registration is required through the system programming. To avoid unexpected registration toanother PBX, the Personal Identification Number (PIN) for the PBX is necessary to register a PS. Theregistration can be cancelled.• HandoverEven if a PS user moves during a conversation, the PS will automatically switch between cells withoutdisconnecting 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. In a stacking connection, the CSs are connected to different PBXs. (® 5.3.1 Stacking Connection)PBXCSHandover:Calls will not bedisconnected.CSCSInterfaceHowever, 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) or Two-way Record is activated (® 3.2.2.19 Live Call Screening(LCS) and 3.2.2.34 Two-way Record/Two-way Transfer).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. During a conversation with an extension using PC Console or PC Phone, to which the conversation isbeing recorded.g. If one CS is a SIP-CS and the other is not (e.g., an IP-CS).• DSP Resource UsageMaking a call through an IP-CS with a PS requires a certain number of DSP resources, depending on thecodec used. If all DSP resources are in use, this operation cannot be performed. To ensure a minimumlevel of performance, DSP resources can be reserved for VoIP communication. (® 5.5.4 DSP ResourceUsage)• When a caller has dialled the extension number of a PS but the CS is busy, the caller hears a busy tone.472 Feature Guide5.2.4 Portable Station (PS) Features
