BT-5 - Direct Paging Interface
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List Price £892.80 incl. VAT

Direct Paging Interface

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Product Description

The BT-5 is a Direct Paging Interface which enables staff to make public address announcements from the comfort of their own desk telephone.

The free-standing unit acts as an interface between the analogue telephone system and the PA.


Both the BT-5 & BT-8 free standing units allow staff to dial into the Public Address (PA) system from their desk. The BT-5 & BT-8 act as a network between the telephone system and the PA and allows each individual with the opportunity to contact other members of staff or to make general announcements. This avoids contact to a busy reception/switchboard with a request to put a call out.

To Install the units, simply connect to a PA amplifier and an available telephone extension socket (BT5) or a building’s telephone exchange (BT8). A paging announcement is available by simply dialling into the unit’s extension.

Specification Sheet


  • Operated by simply dialing the BT5 extension number
  • Supplied with an IEC mains lead
  • Connect to a telephone extension socket and the public address amplifier
  • Fully approved by BT (approval number S/2455/3/H/452969)
  • The BT5 will provide the user an acknowledge tone, followed by a chime (optional OPT33 fitted). A live broadcast announcement can then be made.
  • Upon completion of the broadcast the BT5 will disconnect from the PA system and release the telephone extension ready to accept another call
  • Outputs are selectable from line or microphone level
  • Priority level control available
Description BT-5
Ring voltage 11v @ 50Hz
REN value 1.0
Mic output level 5mv @ 22Ω
Line output level 0dBM @ 600Ω
Engaged tone 600Hz, 250ms on - 250ms off, -13dBM
Acknowledge tone 600Hz, 2 sec @ -13dBM
Tone level to line -13dBM
Min line level to hold 30mA
Time out delay Normal 28 sec - engaged/busy 8 sec
Voice operated switch Absence of caller speaking
Amplifier access output 1 x NPN open collector 40v @ 100mA max
Amplifier busy input connects to 0v via amp busy
Supply input 220-240v, 50Hz
Fuse protection 50mA (F), 250mA (T)
Dimensions 122(H) x 270(W) x 70(D)
Weight (Net) 2.00kg
Weight (Gross) 2.30kg

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