Telephone Training Adapter Y Splitter for Headset or Handset for Nortel Meridican, Norstar, Avaya, Ashtra, Mitel, Polycom, Ge and Other Ip Phone Can plug either into handset port or headset port Handset or Headset Splitter Complete with RJ9/RJ12 plug Great use for call center / telephone marketing trainings Easy setup, plug and play