About APS-11 Electronic Hook Switch (85Q78AA)

Compatible with Agfeo desk phone models ST30, ST31, ST40, ST40IP.

Compatible with Funkwerk desk phone models CS410, CS410-U, IP-S400, CS290-U, IP290 Plus.

Compatible with Mitel desk phone models 5380, 5370, 6771, 6773, 6775, 6735i, 6737i, 6739i, 6753i, 6755i, 6757i, 6865i, 6867i, 6869i, 5370ip, 5380ip, 6773ip, 6775ip, 7434ip, 7444ip, 6757i CT.

Compatible with Tiptel desk phone models 85 System, 3011/22 System, 274, 275.

Compatible with T-Systems desk phone models F20, F30, F40, F50, F630, F640, F660, F680.

Works with Plantronics Savi 700 Series, CS500/CS500 XD Series, MDA200, Voyager Legend CS.

About Poly

As a trusted Poly partner, Telrex is proud to offer a full range of headsets, conference phones, business phones, video conferencing, software, and services. Poly's wide range of communication solutions allows your business to stay connected regardless of your team's location. Our Telrexperts have helped thousands of clients in various industries, from government and education to healthcare and financial services.