Line Isolation Units

Music-on-Hold Line Isolation Unit

Provides a high quality connection for any music source or paging system to your Telephone System to provide Music-on-Hold or to allow connection of a paging system.

Available in two versions, Standard or DC blocking

Features (All Models):

  • Non-clipping design
  • Suitable for connection of all music sources and Paging systems
  • Volume Control (Input attenuator)
  • Selectable output limiting

LIU (361/400) Product Code:LIU

Technical Specifications:

  • Output Limiting: 800 mV or 2.8V Peak to Peak (selectable by internal jumper) when terminated with 600ohms
  • Frequency Response: 20Hz to 20kHz – designed to minimise distortion.
  • Input Attenuation: Selectable via volume control
  • Safety Isolation: 3000V
  • Music Input: 3.5mm stereo plug, with 500mm cable
  • Output: 6 Way modular socket

LIU-DC Blocking (361/500) Product Code: LIU-DC

Designed for systems where MOH is connected via 6 Way Modular MOH input.

Technical Specifications:

  • Provides capacitive AC coupling to the Commander E-PABX system.
  • Output Limiting: 800 mV or 2.8V Peak to Peak (selectable by internal jumper) when terminated with 600ohms.
  • Frequency Response: 20Hz to 20kHz – designed to minimise distortion.
  • Input Attenuation: Selectable via volume control
  • Safety Isolation: 3000V
  • Music Input: 3.5mm stereo plug, with 500mm cable
  • Output: 6 Way modular socket

LIU-PA (361/409) Product Code: LIU-PA

Designed for installations where a PA system (with 3.5mm unbalanced input) is connected to a telephone system via an SLT port.

Technical Specifications:

  • Provides a permanent 820ohm DC loop to the SLT port.
  • Frequency Response: 20Hz to 20kHz – designed to minimise distortion.
  • Input Attenuation: Selectable via volume control.
  • Safety Isolation: 3000V.
  • Input from phone system: 6 Way modular socket.
  • Output to PA: 3.5mm stereo plug, with 500mm cable.

LIU-PAN (6.5mm) Product Code: LIU PAN (6.5mm)

Designed for installations where a PA system (with 6.5mm balanced input) is connected to a telephone system via an SLT port.

Technical Specifications:

  • Provides a permanent 820ohm DC loop to the SLT port.
  • Frequency Response: 20Hz to 20kHz – designed to minimise distortion.
  • Input Attenuation: Selectable via volume control.
  • Safety Isolation: 3000V.
  • Input from phone system: 6 Way modular socket.
  • Output to PA: Balanced 6.5mm stereo plug, with 500mm cable.

LIU-Powered (361/600) Product Code: LIU-PW

Designed for telephone systems where MOH is connected via an Analogue Trunk port.

Technical Specifications:

  • Provides a permanent DC feed current to a looped analogue trunk.
  • Output Limiting: 800 mV or 2.8V Peak to Peak (selectable by internal jumper) when terminated with 600ohms.
  • Frequency Response: 20Hz to 20kHz – designed to minimise distortion.
  • Input Attenuation: Selectable via volume control
  • Safety Isolation: 3000V.
  • Input from music source: 3.5mm stereo plug, with 500mm cable.
  • Output to phone system: 6 Way modular socket.
  • DC Feed: 9V Plug Pack supplied to Looped trunk port for MOH/ Paging Input at RJ Pins 3,4.