[Compatibility Notices]:
The compatibility of this telephone training adapter depends on whether your RJ9 headset is compatible with your telephone. As long as your headset is compatible with your telephone, the adapter will work properly. This Y splitter is compatible with Cisco, Yealink, Avaya, Plantronics, Polycom, ShoreTel, NEC, Aastra, Nortel, Mitel, GE and other IP phones.