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Business Telephone Key Service Units (KSU)

From early Nitsuko / TIE through AT&T / Lucent Merlin, Toshiba and Comdial, we carry almost all legacy office telephone KSU brands.

Over the years we have developed expertise in many different brands while maintaining the ability to support those products if a customer runs into a compatibility or functionality problem.

If you have a question about any of the equipment here (or something you don't see that you need), please contact us. We are working hard to constantly uupdate our website with relevant and important product information, so please check back often or email us for help or advice about compatibility, features, or anything else related to the products you find our on our site.

Make an Offer!

We love finding a great deal as much as the next person and are happy to entertain any reasonable offer for any equipment you see for sale here. We will also do our best to price match any serious competitor.

If you find a better price, better terms or better anything else but want to give us a chance to earn your business, please contact us with the product you want to purchase, the quantity you are seeking and the per unit price you think is fair and we will get back to you as quickly as possible. Please keep in mind that we offer "free" shipping on nearly every product; while that's proven to be a good marketing position, the reality is that shipping is never free and must be factored into our final negotiagted price.

Office Telephone KSU User Guides / Manuals

As of February 2018, we have been working hard to add product manuals to as many of our product pages as possible. Tracking down a manual from 1985 has sometimes been a challenge, but if you need any help finding a manual / administrators guide for your product please contact us and we will do our best to help.

Sell to Us

We are always interested in buying related business telephone equipment and under most circumstances will pay for shipping by sending you prepaid label(s). Please get in touch with a list of what you have to offer and we will get back to you as quickly as possible.