PK-543A Multi-Housing Intercom Amplifier Can Replace Most Major Brands of Apartment Intercom Amplifiers for 3-wire, 4-wire or 5-wire hook-up.
The PK-543A apartment intercom amplifier by Lee Dan Communications of Hauppauge, N.Y., is a self-contained audio and access control system designed for use with 3-wire, 4-wire and 5-wire apartment intercom stations. The PK-543A provides amplification of two-way audio as well as door control. The unit includes the necessary power circuits required to operate a complete apartment intercom system.
The PK-543A features volume and tone controls for audio output adjustments at both the main directory and inside apartment stations. Additional functionality includes multiple entrance operation, relay control of door strikes and electromagnetic locks, three selectable door timing modes, a post-office door lock release, both steady and warble call tones, and more.
PK-543A can also replace most other major brands.