 "Polycom - interface module" " Polycom module 2200-07156-001 Phone Accessories CDW.com
"Polycom develops, manufactures and markets a full range of high-quality, easy-to-use and affordable voice and video communication endpoints, video management software, web conferencing software, multi-network gateways, and multipoint conferencing and network access solutions." 
 "Polycom Interface Module SS2" " Polycom SS2 - 2305-06415-601 Hardware Upgrade/PC Cards CDW.com
"Interface Module for SoundStation 2 Avaya 2490 conference phone" 