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Soundpoint650 + Hook Switch Adapter APP-5 +Plantronics CS55 wireless headset

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Soundpoint650 + Hook Switch Adapter APP-5 +Plantronics CS55 wireless headset

Plantronics can't help me so I want to ask the Polycom Community for help.



I have a Polycom Spountpint IP 650 ( BootRom
an Hook Switch Adapter APP-5
and a Plantronics CS55 Wireless headset.


The phone is setup using Analog Headset Regular mode.


The problem is when the phone rings you can't answer the call using the call/control button on the headset you will need to press the headset button on the phone


When you press the button on the headset you can hear a click of a relay but it will not pick up the line.



Any suggestions?



Thank you

Message 1 of 2
Polycom Employee & Community Manager

Re: Soundpoint650 + Hook Switch Adapter APP-5 +Plantronics CS55 wireless headset

Hello birkey,


welcome to the Polycom Community.


Did you check => this <= Document  from the Feature Descriptions & Technical Notifications page?


Page 4 Quote:




To use electronic hookswitch, the Savi Office Series models must be equipped with a Plantronics APP-50 cable (Plantronics SKU 38439-01) while the CS Series must be equipped with a Plantronics APP-5 cable (Plantronics SKU 38438-01).


The following models are compatible:


• Savi Office Series (WO100, WO200, WO300, WO350 only)

• CS Series (50, 55, 60, 70N, 261N, 351N only)"


It seems you are using the correct Adapter for your Headset.


As you have not stated what UCS/SIP Software you are running I recommend the UCS 3.3.0 Admin Guide from => here <= as this mentions the following on Page A - 120:




Selects optional external hardware for use with a headset attached to the phone's analog headset jack.

If set to 0, no compatible headset is attached.

If set to 1, a DHSG-compatible headset is attached and can be used as an electronic hookswitch.

If set to 2, a Plantronics compatible headset is attached and can be used an electronic hookswitch.


I would recommend to contact your Polycom Reseller and/or Polycom Support in order to get further assistance if needed.


Best Regards


Steffen Baier


Polycom Global Services 

The title Polycom Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. My official "day" Job is 3rd Level support at Poly but I am unable to provide official support via the community.


Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's
Message 2 of 2