Updated by Hayden Everly on Feb 7, 2024
The male 2.5mm to Male RJ45 adaptor cord comes in two pieces and plugs into a black box to form 1 cord.
Note: You can take this apart, but we don't recommend it
The RJ 45 to RJ9 cord and the RJ9 to 2.5mm cord don’t work well on their own. For example, you can’t use it to plug a Leitner wireless headset into a 2.5mm jack. (For that you’d want cat # 2178, the Polycom adaptor box) [DISCONTINUED]
But together, they are magical!
They work for OfficeRunners (and other Sennheisers) and Plantronics wireless headsets.
They do NOT work with Cisco SPA phones that have those weird headset jacks. But for just about every other office phone that has a 2.5mm headset jack, these should work wonders for wireless headsets.
Time for a new headset?
Many Plantronics (and Sennheiser) Customers have switched to the Leitner LH270!
This is the internal support database for Headsets.com. We manufacture and sell office headsets in North America. With over 25 years' experience in the business, we know headsets.
Please use our support database for free headset support, whether you’re a Customer of ours (or not). If you have problems, suggestions, or unanswered questions, please email us at hello@headsets.com (compliments also welcomed 😀)
Looking for office headsets in the UK? Check out Headsets.co.uk.
What's the Difference Between Analog and Digital Phones?
Do any Wireless Headsets Work with Uniden Corded/Cordless Phones?
What can the Male 2.5mm to Male RJ9 Adapter Cord Work With?
Leitner Corded Compat Settings
This is the internal support database for Headsets.com. We manufacture and sell office headsets in North America. With over 25 years' experience in the business, we know headsets.
Please use our support database for free headset support, whether you’re a Customer of ours (or not). If you have problems, suggestions, or unanswered questions, please email us at hello@headsets.com (compliments also welcomed 😀)
Looking for office headsets in the UK? Check out Headsets.co.uk.
Questions/comments?