Loading...

Call In Use Indicator

Off Hook Indicator

 

When you need to know that a Telephone Line is In Use

When you need to know that a Telephone Line has been Left Off Hook

Ideal for use with Dial Out Emergency Telephone Lines and Intercoms

 

For use on STANDARD TELEPHONES lines and also ANY of the following Telephone Lines :

* PSTN   * FIBER LInes   *  PBX Extensions   *  FXO Ports   * FXS Ports   * ATA Analog Telephone Adaptors   * Cellular Gateways  *

FEATURES

  • Easy 'Plug In' Installation

  • Accessories are powered from Off Hook Indicator

  • Accessories are supplied with an Easy Mount 'Wall Mount Bracket'
     
  • Cost Effective & Reliable
     
  • Two Year Warranty

OPERATION

OFF HOOK INDICATOR (OHI) is designed to connect ANYWHERE on a conventional Telephone Line, Analog Extension OR any of the above Line Sources. It can be connected in any Series or Parallel position on the line that it is monitoring.

In the Event that a Telephone Line (or simulated Telephone Line) goes ‘Off Hook’, OHI will CLOSE an Internal Relay 5 seconds later and leave it CLOSED until the Line goes back ‘On Hook’. This allows OHI  to be used as a Line In Use Indicator.

TIMED RELAY DELAY  (for use as a 'Left Off Hook Indicator')

A low cost DELAY TIMER OPTION is also offered (Model OHI-2) This option allows you to set a DELAY TIME before Off Hook Indicator closes its internal relay to Alert the attached Tone Alert or Strobe Alert accessory. The cost of this option is just ($20).

The choice of Delay Times are : 1, 2, 5, 10, 15, 30, 45 mins and 1, 2, 3, 4, 5, 6, 7 hrs which allows OHI-2 to be used as a Line Left Off Hook Indicator.

Two Accessories are designed for use with Off Hook Indicator

Tone Alert Accessory

 

$A 69.00

Our Tone Alert Accessory outputs an Alert Tone as soon as it detects the Relay Closure output from Ring Indicator.

Its output volume can be adjusted to suit any application :

  • A volume pot is located on the underside of the unit, to allow for volume adjustment to suit open office areas up to 1000-2000 sq ft, or small factory areas.
     
  • An amplified 3.5mm Audio Output (7W) is also provided to allow for connection of additional standard 8 Ohm Speakers, or PC type Speakers with Amplifier and Volume Control. This will suit larger Office Environments, Noisy Office Environments, or small-medium sized Factory Areas. 
     
  • The 3.5mm Audio Output can also be connected to an External Amplifier so that it’s Alert Tone can be used for ANY sized Office Environment, External Area or Factory Area serviced by a suitable Amplifier. 

Tone Alert uses an Internal Microprocessor circuit and Speaker to produce a Dip Switch selectable Alert Tone (400Hz) or an Alarm Tone (1100Hz) tone, rather than the annoying high pitched frequency of inexpensive ‘Piezo Alarms’. 

The Dip Switch located on the underside of the unit will also allow the Warning Tones output ‘cadence’ to be changed to suit different applications. It can output : This Accessory also has a Dip Switch located on the underside of the unit, to allow the Alert Tones output ‘cadence’ to be changed to suit different applications. It can output :

  • A Continuous Tone

  • A repeating Tone that is 4 Seconds On and then 4 Seconds Off

  • A repeating Tone that is 8 Seconds On and then 8 Seconds Off

  • A repeating Tone that is 2 Seconds On and then 4 Seconds Off (same as a Phone Ring)

 

 

 

Strobe Alert Accessory

 

$A 49.00

Our Strobe Alert Accessory uses EIGHT High Intensity RED LED’s which Flash to alert Users as soon as it detects a Relay Closure Output from Off Hook Indicator.

 

When Wall Mounted, it is Ideal for a small office (up to 500-1000 sq ft), or for small Factory Areas.

For Larger areas, Two or More Strobe Alert Accessories can be connected in parallel to the Natcomm unit :

This Accessory has a Dip Switch located on the underside of the unit, to allow the 'Strobe Flash Cadence' to be changed to suit different applications. It can output. A continuous tone. 

  • A Continuous Strobe Flash

  • Strobe Flash that is 4 Seconds On and then 4 Seconds Off

  • Strobe Flash that is 8 Seconds On and then 8 Seconds Off

  • Strobe Flash that is 2 Seconds On and then 4 Seconds Off (same as a Phone Ring)

 

Wall Mounting Bracket       

 

The plastic enclosure of both accessories has 2 ‘Key Hole Slots’ molded into the bottom plate to provide for Easy Wall Mounting.

A Wall Mount Bracket is supplied with each Accessory and this unit screws direct onto a wall with 2 small crews. Once the Wall Mount Bracket is in place, the Accessory 'Clips' straight into the Keyholes and then you just pull it down lightly to lock it into place.

Power and Connection

Both Accessories are powered direct from Off Hook Indicator and connect with just 4 wires. An expandable 'Curly Cord' cable is provided with each Accessory, to allow it to be placed or mounted in a convenient nearby location.

If the Accessory needs to be remote from Off Hook Indicator, it can be located up to 100 yards away if solid core cabling is used. Cat 3 (standard telephone cable) or Cat5 cable or Standard Telephone Cable is ideal. Polarity is not important as the Accessory has an Integrated Polarity Rectifier.

If the Accessory is to be located more than 100 yards away, it has a standard 12VDC (2.5mm) Power Input Socket to allow for local powering. You can use a separate local 12VAC or 12VDC input of any polarity.

Should the 12V power source to Off Hook Indicator be lost or disconnected, its Internal Relay will remain Open (Normal Open Relay) and it will remain Open on reconnection of its 12V Power source.

Third Party Electrical Device

The relay output from OHI can also be used to advise an external 3rd party electrical device that the telephone line is Off Hook.

The relay output from OHI is Dry Contact (Rated at 1A at 12V). 

OHI’s relay contacts connect to the centre 2 pins of the 4P4C RJ socket of OHI.

This output is ideal for many devices where a simple ‘unpowered’ relay closure is required.

A Connection Box with a short cable to connect it to OHI is provided to allow for quick and easy connection to the external 3rd part device.

The Connection Box has 2 screw terminals for cable connection to the external 3rd part device.

The Connection Box screw terminals also connect to the centre 2 pins of the 4P4C RJ socket of OHI.

 

Our Off Hook Indicator User Guide contains additional detailed information

To DOWNLOAD a copy of our USER GUIDE - Click Here


 
Off Hook Indicator

AU $199.00

Standard Model (OHI-1) Off Hook Indicator ; connects to ANY Telephone Line or Extension and is designed to Alert you that a Line is In Use, OHI has an Internal Relay which is designed to control a Strobe Alert or Tone Alert accessory. 

   
Off Hook Indicator - with Programmable Del...

AU $229.00

Programmable Delay  Model (OHI-2) is fitted with the Delay Option  : This model is fitted with a set of 4 Dip Switches located on the underside of the unit which will allow you to set a DELAY TIME before Off Hook Indicator closes its internal relay to Alert the attached Tone Alert or Strobe Alert accessory. The choice of Delay Times are : 1, 2, 5, 10, 15, 30 or 60 mins and 1, 2, 3, 4, 5, 6 and 7 hrs.

 
 
Strobe Alert Accessory

AU $49.00

Strobe Light Accessory uses EIGHT High Intensity RED LED’s which Flash to alert Users as soon as it detects a Relay Closure Output from the applicable Natcomm Product that it is connected to. When Wall Mounted, it is Ideal for a small office (up to 500-1000 sq ft), or for small Factory Areas.
For Larger areas, Two or More Strobe Light Accessories can be connected in parallel to the Natcomm unit.
   
Tone Alert Accessory

AU $69.00

Tone Alert Accessory  outputs a Warning Tone as soon as it detects the Relay Closure output from one of the applicable Natcomm Products that it is connected too. Its output volume can be used to suit any application.