Off-Hook Relays

In a telephone based paging system, a telephone situated near a paging speaker can create acoustic feedback that makes paging impossible. Off-Hook Relays automatically disable paging speakers near the telephone to eliminate this problem.

Off-Hook Relays can also trigger signaling devices when, for example, an emergency phone is in use.


Guardian Telecom Telephone Enclosures & Accessories are designed with the versatility to enhance or replace components or workings.


Product Features

  • All relays are encapsulated in polyester epoxy resin
  • Maintaining safety standards may require use of special wiring conduits or other considerations
  • Electrical Performance
    Line Voltage       48 Volt 24 – 56 VDC
    24 Volt ≈ 24 VDC
    Relay Rating Maximum Load       5 Amps
  • Six Off-Hook Detect Relay Models to select from:
    • 48V Off-Hook Detect Relay – Order number: P7227
    • 24V Off-Hook Detect Relay – Order number: P7228
    • 24V Off-Hook Detect Relay/Weather Proof Enclosure – Order number: P7229
    • 24V Off-Hook Detect Relay/Explosion Proof Enclosure – Order number: P7231
    • 48V Off-Hook Detect Relay/Weather Proof Enclosure – Order number: P7232
    • 48V Off-Hook Detect Relay/Explosion Proof Enclosure – Order number: P7233
  • Weather Proof and Explosion Proof enclosures available