Due to the merging of manufacturing and technology sharing between NEC and Nitsuko, you will find this series of office telephone in the market branded under one of these names; however the underlying technology and compatibility are exactly the same.
We are one of the few remaining dealers in the world who work hard to keep these phones on our shelves; if you purchase these units elsewhere we're not kidding when we tell you that there is high probability that the company you buy from will end up buying it from us!
While you will find many different models of these specific business phones on the market, compatibility for this generation of phones is refreshingly simple: any phones with part numbers beginning with 600xx will be compatible on the same sysetm together.
Part numbers ending in the digit "1" or "6" include speakerphone functionality; any other model numbers are Monitor / One-Way speaker only.
If you are looking for a particular NEC / Nitsuko TIE 600xx series phone and can't find it listed here, please contact us and we will get back to you as quickly as possible with whatever help we can offer.