Poly APP-50 Electronic Hook Switch for Poly IP Phones Savi CS500 Series

Poly APP-50 Electronic Hook Switch for Poly IP Phones, Savi and CS500 Series The Poly APP-50 is a legacy electronic hook switch cable designed to connect compatible Poly wireless headset systems to selected Polycom and Poly IP phones. It enables remote call notification, answering and ending through the headset’s call-control button, helping users manage desk-phone calls without lifting the handset. The APP-50 was originally developed for Savi Office systems, with later HP guidance also listing support for selected CS500 and Savi configurations. Remote Call Answer and End Control The APP-50 transfers electronic hook-switch commands between a supported Polycom phone and compatible wireless headset base. When correctly configured, an incoming call can be answered from the headset and an active call can be ended through the same call-control button. No Mechanical Handset Lifter Required Electronic on-hook and off-hook control removes the need for an HL10 mechanical handset lifter on supported installations. The cable communicates directly with the phone’s headset control interface while audio is routed through the headset connection. Designed for Savi Office Systems Original Polycom compatibility documentation identifies the Savi Office WO100, WO200, WO300 and WO350 as the primary APP-50 headset systems. These are legacy products, so the exact base model and firmware should be checked before purchasing replacement cables. Selected CS500 Compatibility Later HP installation guidance lists APP-50 or APP-51 for CS500 Series systems. Documented CS500 examples include the CS510, CS520, CS530 and CS540, but compatibility should be confirmed against the exact base and telephone because the APP-51 became the later replacement cable. Compatible Polycom SoundPoint Phones Documented phone support includes selected SoundPoint IP 320, 330, 335, 430, 450, 550, 560, 650 and 670 models, together with the VVX 1500. SoundPoint IP 320/321 and 330/331 phones require an additional Polycom RJ-9-to-2.5 mm adapter. Phone Configuration Required The phone’s analogue headset setting must be changed to Plantronics Mode before electronic hook-switch control can operate. Most documented phones require SIP application version 3.1 or later and BootROM 4.1.0 or later; the SoundPoint IP 670 requires SIP application 3.0.2 or later and BootROM 4.1.0 or later. APP-50 and APP-51 Are Different The APP-51 replaced the APP-50 and added support for a compatible Online Indicator or busy light. The APP-50 should not be selected where OLI support is required, and the newer APP-51 is the more appropriate option for many later Poly phones and wireless headset systems. Key Features: Provides electronic hook-switch connectivity for selected Polycom and Poly IP phones. Supports remote incoming-call notification on compatible systems. Allows supported calls to be answered and ended from the wireless headset. Eliminates the need for a mechanical handset lifter. Originally designed for Savi Office WO100, WO200, WO300 and WO350 systems. Later HP guidance lists selected CS500 and Savi systems as compatible. Requires Plantronics Mode and suitable phone software to be enabled. Compatibility Information: Device Category Documented Compatibility Original Savi Office Systems WO100, WO200, WO300 and WO350 CS500 Series Examples CS510, CS520, CS530 and CS540; exact base compatibility must be confirmed SoundPoint IP 320 Series IP 320 and IP 321; additional adapter required SoundPoint IP 330 Series IP 330 and IP 331; additional adapter required Other SoundPoint IP Phones IP 335, IP 430, IP 450, IP 550, IP 560, IP 650 and IP 670 Polycom VVX VVX 1500 Additional Adapter Polycom 2200-11095-002 for SoundPoint IP 320/321 and 330/331 Later Replacement Cable APP-51, part number 38439-11 Older Pre-CS500 CS Systems Use APP-5 rather than APP-50 Technical Specifications: Specification Details Brand Poly, formerly Plantronics Model APP-50 Manufacturer Part Number 38439-01 Product Type Electronic hook switch cable Telephone Platform Selected Polycom SoundPoint IP and Polycom VVX phones Original Headset Platform Savi Office Series Additional Headset Platform Selected CS500 and Savi systems according to later HP setup guidance Remote Call Alert Supported on compatible installations Remote Call Control Call answer and call end Mechanical Handset Lifter Required No, when used with a supported and correctly configured system Online Indicator Support No; use APP-51 where OLI support is required Phone Headset Mode Plantronics Mode General Software Requirement SIP application 3.1 or later and BootROM 4.1.0 or later SoundPoint IP 670 Requirement SIP application 3.0.2 or later and BootROM 4.1.0 or later Connection Type Wired EHS connection between the phone and headset base Product Generation Legacy model replaced by APP-51 Compatibility Requirement The phone, software version and wireless headset base must all support APP-50 Add remote headset call control to a confirmed Polycom phone and compatible Savi or CS500 installation with the APP-50.