TransTel Communications makes a real nice system TDS-600 series
3 year warranty. Many features and flexable programming. I've been in business over 30 years this is the best telephone equipment I work with.

https://transtelcommunications.com/

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Merritt
Commercial Communications
1-800-244-3033


Merritt

Business Telephones & Equipment + Commercial Audio/Video Products
Commercial Communications . . . Turner, Maine
If it was built after 1980 don't expect it to work right.