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We specialize in used & refurbished business phones for existing phone systems

Comdial Phone Systems

Shop AllComdial Phone Systems

Business Telephone Sales sells refurbished Comdial Telephone (aka Vertical Communications) equipment at the lowest prices. There are many Comdial phones, but each must work on the appropriate phone system. Comdial has manufactured multiple phone systems throughout the years, and there are major compatibility issues. As the consumer, you must purchase the Comdial telephone that will work on your existing Comdial phone system.

Our Comdial phone systems are monitor phones which work on the Executech system and support 2 to 23 lines. We also sell Comdial phone parts, such as handsets and expansion cards for your growing business. The Comdial phones are available in ash, gray, or black.

There are three main Comdial phone systems. The older Comdial Executech Telephone system, the more recent Comdial Impact DSU/DSU II Telephone system, and the Comdial DX-80 (7260-00) phone system. Not all Comdial telephones will work on all Comdial phone systems. Comdial phones are very complicated with compatibility. If you are not sure what phones will work on your system, please feel free to ask.

Comdial System (KSU) Model Compatible Comdial Phones

Comdial NO308

6706X-PG, 6706X-FB, 6714X-PG, 6714X-FB, 6714S-PG, 6714S-FB

Comdial NO616

6706X-PG, 6706X-FB, 6714X-PG, 6714X-FB, 6714S-PG, 6714S-FB

Comdial NO816

6706X-PG, 6706X-FB, 6714X-PG, 6714X-FB, 6714S-PG, 6714S-FB

Comdial Executech 308

3508-XX, 3598-XX, 6414-XX, 6414S-XX

Comdial Executech 616

3508-XX, 3598-XX, 6414-XX, 6414S-XX

Comdial Executech 816

3508-XX, 3598-XX, 6414-XX, 6414S-XX

Comdial Executech 824

3508-XX, 3598-XX, 6414-XX, 6414S-XX

Comdial Executech 1432

6614-XX, 6614S-XX, 6614T-XX, 6600-XX, 6600E-XX, 6600S-XX

Comdial Impact GO408

8101, 8112N, 8112S, 8012S, 8024S

Comdial Impact GO816

8101, 8112N, 8112S, 8012S, 8024S

Comdial Impact GO1632

8101, 8112N, 8112S, 8012S, 8024S

Comdial Impact JO408

8101, 8112N, 8112S, 8012S, 8024S, 8312S, 8324S, 8324SJ

Comdial Impact JO816

8101, 8112N, 8112S, 8012S, 8024S, 8312S, 8324S, 8324SJ

Comdial Impact JO1632

8101, 8112N, 8112S, 8012S, 8024S, 8312S, 8324S, 8324SJ

Exceptions to the Comdial Compatibility Rules:

6614-XX, 6614E-XX, 6614T-XX, 6614S-XX, 6600-XX, 6600S-XX may work on the Comdial NO KSU's but the buttons work different and you will need to do some programming.

8312S-XX, 8324S-XX, 8324SJ-XX will work on the Impact GO KSU's if the software is revision 20A or higher

Service & Reliability

We know how important it is to have a reliable Comdial phone provider who will stand behind their products. We offer a 30-day warranty on all our Comdial phones as well as toll free customer service. All Comdial Telephone Systems and Comdial phones are refurbished. If you do not see what you are looking for please call us at 800-396-9699.


Click here to see our full selection of Comdial phone systems