Intercom Systems Services in Discovery Bay, CA
4. Cal Communication Service Inc.
Serving the Discovery Bay Area
OPEN 24 HOURS
From Business: Low Voltage Specialists fire, security, master clock, CCTV, intercom, and paging systems.U.L. Certified for installation, testing and maintaining life safety systems.
72 Years
in Business
5. Midwest Systems & Services Inc
Serving the Discovery Bay Area
From Business: Midwest Systems & Services, Inc. is a security, sound, and communications contractor. We give you the personal service you'd expect from a small company and the products and…
39 Years
in Business
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