PC35-RJ9X - PC Headset to Universal RJ9/RJ10/RJ22 Phone Switch Adapter

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This RJ9 adapter allows you to use a PC (dual 3.5mm) headset with most office phones. The 8 channels cover most phone models including CISCO!
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Product Overview

  • Use your headset with almost any office phone - 8 settings cover most phone models
  • Combines our PC35-RJ9A and PC35-RJ9Cisco adapters into one universal!
  • Convert two 3.5mm plugs to single 4P4C RJ9/RJ10 headset plug. Works with mono and stereo PC headsets!
  • Works great with most VOIP phones with a RJ9/Rj10/Rj22 headset jack
  • Does not work with RJ11 jack, which is wider than your 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.

Our PC35-RJ9X switch converts the standard headset 3.5mm mic/audio plugs to a standard RJ9, RJ10, or RJ22 handset plug, allowing you to use your favorite computer/laptop headset with your IP phone. This adapter is designed for use with headsets that have two 3.5 mm. plugs; one for the microphone and one for the headphones/earpiece(s). The switch outputs binaural sound for stereo headsets, meaning you will hear sound out of both ears. Once you plug the headset into our adapter switch, and the adapter into the designated headset jack of your phone, you will need to move the switch setting selector up or down until you get optimal sound for the phone you are using.


How to Use:

  1. Plug your dual 3.5mm headset into the PC35 ends. Match the microphone and headset cables. 

  2. Plug the RJ9 end of the adapter into your phone's RJ9 headset jack. 

  3. Switch through the different channels and find which one gives you a clear connection!


This adapter switch cable is approximately 13" (thirteen) inches long.


Q: What is the difference between this adapter switch and the 01-PC35-RJ9A and 01-PC35-RJ9Cisco adapters?
A: This 01-PC35-RJ9X adapter switch is our newest Headset Buddy product. It acts as a combination of the PC35-RJ9A and PC35-RJ9Cisco adapters, allowing you to use your PC Headset with both Cisco and non-Cisco phones! You are able to do this by moving the switch setting selector to the setting that is perfect for the specific office phone you are using.
Q: How do I know what switch setting is right for my phone?
A: Due to the large number of phone manufacturers and phone models, we are unable to provide a conclusive switch setting list. To find the proper setting for your VOIP office phone, you can do some basic testing. Simply plug the headset into the switch, and the switch into the designated headset jack in your phone. Then, move the switch selector up and down while listening to the quality of sound, until you find the setting that is right for you.
Q: My phone is not listed on your compatibility list. Will it work with your adapter switch?
A: Due to the large number of devices out there, we are not able to test our Headset Buddy products on every phone. If our Headset Buddy does not meet your expectations, please return it within 30 days of purchase so we can refund you in full.


Free returns, always!

We have a 30-day, no-questions-asked return policy for all of our products as well as a one-year, 100% Satisfaction guarantee; We’ll replace your Headset Buddy for free within the first 12 months.

For further information about Headset Buddy's Warranty and Shipping & Returns policies select the imbedded links

Warranty Information

Incompatible Phones

Avaya 1608, 1616, 2410, 9601, 9608, 9610, 9611, 9611G, 9620, 9620L, 9621, 9630, 9640, 9641, 9650, 9670

Cisco 7902, 7905, 7910, 7911, 7912, 7920, 7921

Most Polycom Phones

Nortel 1140T and Visa 350

Uniden Dect2088, TRU9496

Incompatible Headsets

Plantronics MX500

Compatible Phones

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 handset jack. If your phone is on this list and the Headset Buddy doesn't work then we'll refund 100% of your purchase plus pay for return shipping.

Aastra/Packet8/8x8 480e, 480i, 53i, 55i, 57i, 57iCT, 6753i, 6755i, 6757i, 9112i, 9133i, 9143i, 9480i

AltiGen IP Phone 500, 510, 600, 705, 710, 720

Avaya 4600 Series IP – 2420, 4610SW, 4612, 4620SW, 5610SW

Avaya: 2410, 9620L

Cisco: 6921, 6941, 6961, 7931G, 7940, 7941G, 7942G, 7945G, 7960, 7961, 7961G, 7962G, 7965G, 7970, 7971, 7971G, 7975, 7975G, 7985, 7985G, 8811, 8841, 8851, 8861, 8865, 8941, 8945, 8945G, 8961, 9951, 9971; 12VIP, 30VIP, CTS 500

ESI 48-Key IP Feature Phone and 48-Key Digital Feature Phone

GE Model 2-9451

Inter-Tel 8520, 8560, 8600, 8620, 8660, 8662, 8690

Lucent 8410D

Mitel IP 4015, 4025, 4125, 4150 5000, 5010, 5020, 5040, 5055, 5140, 5201, 5205, 5207, 5210, 5212, 5215, 5220, 5224, 5230, 5235, 5240, 5250, 5320, 5312, 5324, 5340, 5550

NEC Dterm Series E - DT330, DTP-8, DTP-8D, DTP-16, DTP-16D, DTP-32, DTP-32D, DTU-8, DTU-8D, DTU-16, DTU-16D, DTU-32, DTU-32D,DTH-8, DTH-8D, DTH-16, DTH-16D, DTH-32, DTH-32D

Norstar T7316E, M3904

Nortel 1140T, Nortel Visa 350

Nortel IP 1120E IP, 1140E IP, 1150E IP, i2002 and i2004

Nortel IP – 1230

Nortel Meridian Norstar Northern Telecom: T7316, T7316E, M7310, M7208, M7308, M7316, M7324, M7900, M2216, M3903, M3904, M3905, M5208, M5209, M5216, M5317, M8001, M8003, SL100, model NTZK23AA, AB: (M2216):ACDI

Panasonic Hybrid

Plantronics T10

Polycom 670 IP

Possum Sero

Shoretel ShorePhone IP models: IP100, IP212K, IP230, IP530

Siemens Optipoint 420 Standard, Optiset E Advance, Optiset Advance Plus + Headset Adapter, Comfort 300E + Headset Adapter, Comfort F300E, Optipoint 410 Advance, Optipoint 410 Standard, Optipoint 500 Advance, Optipoint 500 Basic, Optipoint 500 Office, Optipoint 500 Standard, Optipoint 500 Standard SL, Optipoint 600, Optipoint 600 (requires headset port)

Talkswitch IP Phone, TS-600

Toshiba: Strata CIX, DP5022-SD, DP5023-SD, DP5018-S, DP5000-series, DKT 3001, 3010S, 3020S, 3020SD, 3014SDL (3000 series requires Toshiba BHEU adapter sold by Toshiba)

Uniden Dect2088


3COM 3102, 3103

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  • 5
    Worked for me

    Posted by Olivier Massol on 13th Sep 2016

    Good product. It works with my SNOM 821 phone.

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