Tii's radio frequency filters and half-ringers are contained in environmentally encapsulated plastic shells to withstand the most severe weather conditions. Our electronics are listed to and exceed UL 1863 specifications.

831 Series - Radio Frequency Filters

831 Series are broadband low-pass filters that eliminate undesirable interference from AM, FM and CB radio signals.

AdobePDF.jpg read more (PDF)
AdobePDF.jpg Install Notes 831E (PDF)
AdobePDF.jpg Install Notes 831W2 (PDF)

856E - Half Ringer

The 856E Half Ringer is designed to be installed in parallel with the customer premise phone line; providing an impedance signature equivalent to half of a normal telephone ringer load.

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AdobePDF.jpg Installation Notes (PDF)

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