Page 1
Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com...
MC140A, MC141A, MC142A, MC143A; For two-line phones: MC144A, MC145A, MC146A, MC147A Frequency Range — MC140A, MC144A: 0.5 to 3 MHz MC141A, MC145A: 3 to 30 MHz MC142A, MC146A: 26 to 60 MHz MC143A, MC147A: 100 MHz Attenuation (Nominal) — 50 dB Connectors —...
Page 3
If you still hear interference on your phone, you might need filters in other places in your phone system. Call Black Box Technical Support at 724-746-5500 for advice; we might be able to give you a quote on RF noise filters for other locations on your phone lines.