What are the recommended headsets for Skybox phones?

Below are the recommended headsets for the standard phones:

For both the Cisco SPA303G and the Polycom SoundPoint IP331, we recommend the following 2 headsets:

Jabra BIZ 2400 3-in-1 Mono Corded Headset for Deskphone (non-USB) Cost is approximately $120.00.

Jabra GN2110 Mono Corded Headset (non-USB) Cost is approximately $50.00.

Both headsets need to be purchased with the Jabra GN1200 Smart Cord 6IN Coil Direct Connect part #l 88011-99 which costs approximately $18.00.

The Cisco SPA303G phone has a 2.5-mm standard 4-segment phone jack. It supports most universal 2.5-mm wired headsets.  The Polycom SoundPoint IP 331 requires a QD/ED to 2.5 mm wired connection or a RJ-9 to 2.5 mm wireless connection. 

If you have an upgraded Polycom phone, such as the The Polycom VVX 500 and VVX 600 phones, they officially support certain USB headset models: Jabra Pro 9465-Duo, Jabra Pro 9470, and Plantronics Voyager Pro UC V.  The Polycom VVX 600 phone officially supports the following Bluetooth headset specifications: Integrated Bluetooth 2.1 EDR and Bluetooth headset pairing. HFP/HSP