Voice frequency primary patch bay

{{Short description|Patching facility}}

{{Use American English|date=September 2024}}

In telecommunications, a voice frequency primary patch bay (VF) is a patching facility that provides the first appearance of local-user VF circuits in the technical control facility (TCF).

The VF primary patch bay provides patching, [http://wiktionary.org/wiki/Transwiki:Monitoring monitoring], and testing for all VF circuits. Signals will have various levels and signaling schemes depending on the user terminal equipment.