The PH25-RJ9Cisco converts the standard phone headset 2.5mm plug to a standard RJ9, RJ10, or RJ22 Cisco phone headset plug, allowing you to use your favorite phone headset with your Cisco office phone. The adapter outputs binaural sound for stereo headsets, meaning you will hear sound out of both ears.
Why buy an expensive headset just for your Cisco IP phone?
Use the Headset Buddy Adapter and your existing 2.5mm phone headset with Cisco VOIP phones that have a headset jack. Save money by using a 2.5mm headset with your Cisco office phone.
The adapter cable is approximately five inches long.
Only compatible with Cisco and Ativa phones. Will not work with Polycom, Aastra, Nortel, and most other phones.
Will not work with Cisco handset plug or RJ11 (wall) jacks.
This list is not all inclusive. Please look up the specifications on your specific phone to see if it has a RJ9, RJ10, or RJ22 headset jack. If the Headset Buddy doesn’t work with a model on this list we will be happy to refund 100% of your purchase plus pay for return shipping
6921, 6941, 6961
7931G, 7940, 7941G, 7942G, 7945G, 7960, 7961, 7961G, 7962G, 7965G, 7970, 7971, 7971G, 7975, 7975G, 7985, 7985G
8941, 8945, 8945G, 8961, 8961
Incompatible Cisco phones:
Cisco 7902, 7905, 7910, 7911, 7912, 7920, 7921
Please let us know if you find more compatible phones or incompatible phone models.
Convert 2.5mm plug to CISCO phone single 4P4C RJ9/RJ10 headset plug
Save money by buying standard phone headsets to use with your Cisco phone headset jack
Reduce clutter with single headset
DOES NOT work with RJ11 jack, which is wider than your handset or headset jack (6 positions vs. 4). RJ11 jack is what is in the wall. RJ9, RJ10, RJ22 are what is on your phone handset or headset.
Works only with CISCO and ATIVA phones with headset jacks