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Every telephone on the 402 network is programmed with a Call Category between Category 1 and 5. The category of an extension determines what numbers can be dialled from that extension.

  • Cat 1 : Internal access only
  • Cat 2 : Local Dublin
  • Cat 3 : Mobile and National
  • Cat 4 : United Kingdom
  • Cat 5 : Worldwide access

By default, extension are set to Cat 2, Dublin numbers only. Information Services can issue staff members with a PIN code for their extension so that they can dial additional numbers without going through the Central Switchboard.

Requests for PIN codes must be made in writing to the Service Desk. When requesting a PIN code, staff must

  • Apply in writing to the Service Desk
  • State your Name, Extension Number, Location and a Business Reason for the request
  • ICT Services will then seek authorisation from the Finance Directorate
  • Once the request has been approved, ICT Services will communicate the PIN code via email

To use your PIN code:

  1. Dial *72*12345# (Where 12345 is your registered PIN code)
  2. Dial 0 for an outside line
  3. Dial the required number


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Touch tone services are commonly used with external telephony services such as those used with Information Lines and Telephone Banking. To enable the tone sender on your handset:

  1. Dial the required number and wait until you have been connected
  2. Press 9 (If you are using a phone with a display, the display will change to "Tone Sender On")

The touch tone sender will automatically disengage when you hang up your phone.


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This feature engages a flashing light on your phone to indicate that you have a new voicemail message in your mailbox.

Please contact the Service Desk to have this facility programmed on your phone.


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Limited call conferencing facilities are available at your desk. Three-way calling can be enabled if you are on a call to one person and wish to bring another person into that call so that the three parties can speak to each other at the same time.

Assuming that you are talking to the first party on your first line (ACCESS1):

  • Press INQUIRY and dial the second party that you wish to bring into the conference call
  • When the second party answers their phone, PRESS 3
  • You should hear a should "beep" and then all three parties will be able to speak to each other
  • Any party can leave the call at any stage by simply hanging up


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This feature allows you to transfer a call from your extension to another extension.

  • If your caller is on Line 1 (ACCESS1), press INQUIRY
  • Dial the required extension
  • You can switch back to your original call by pressing ACCESS1 again
  • When you want to transfer the call, press TRANSFER


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To Divert all incoming calls to your number to another internal phone.

  • Key in *21*1234# (Where 1234 is the number you wish to divert to)
  • On display phones, the display should now read "Follow Me : 1234"

To turn off Follow Me:

  • Key in #21#

Note: You do not need to lift the handset to use this feature.


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The Service Desk can program a Call Divert (CAD) button onto your handset. This button is generally pre-programmed to the voicemail system. If you have this feature programmed onto your phone, simply press your Call Divert button to activate. Your display will change to reflect this.

Your phone will not ring when this feature is turned on, as all calls will automatically divert to your voicemail box.

To turn off this feature, press Call Divert again. The display will return to normal.


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Sometimes you make a call to an internal extension and that extension is busy.

By using the Call Back feature, your phone can alert you as to when the person you are trying to contact is no longer engaged.

  • When you hear the "busy signal", press 6 on your phone and then hang up
  • Your phone will call you and if you answer, it will call the person you are trying to reach
  • When using Call Back, the ring tone of your phone will change to signify that a Call Back call
  • To cancel a Call Back, key in #37# on your handset


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If you make a call to an internal extension and that extension is busy, you can alert that person that you are trying to contact them.

  • When you hear the "busy signal", press 5 on your phone and stay on the line.


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Several extensions in the same office or nearby can be included in pickup groups.

When you hear another phone in the same group ringing, you can pick up the call on your own phone.

To have pickup groups setup in your office, contact the Service Desk

To pick up another phone within the pick-up group, press * 8 # on your phone.


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Extensions which are setup with Voicemail have a number of additional options available that allow the user to choose how and when their phone goes to voicemail.

By default, extensions will automatically go to voicemail if a call is not answered after a predetermined number of rings, however if a user is already on a call and another call is received by their extension, they can choose whether the second caller gets a "busy tone" or is diverted to voicemail.

  • To Divert To Voicemail At No Answer:
    • Key in *211#
  • To Divert To Voicemail At Busy:
    • Key in *212#

If you find that these options are not functioning correctly, please contact the Service Desk


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Number logging works in a similar way to the "Missed Call" function that most mobile phones use.

This feature enables users to scroll through a list of phone numbers that have recently dialled your extension number.

To enable this feature on your handset, please contact the Service Desk.

Please note this feature is only available on DBC203 / 223 / 225 handsets.


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Did you know that the unused buttons on your telephone can be programmed by you to act as a "Speed Dial" button? To set up this feature:

  1. Press PROGRAM
  2. Press the button that you wish to use as a "Speed Dial" button
  3. Enter the number that you wish your "Speed Dial" button to call
  4. If you are programming an outside line, don't forget the 0 before the number!
  5. Press the "Speed Dial" button again
  6. Press PROGRAM again


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This feature changes the ringing tone of your telephone when you have an incoming call.

To change your ring tone:

  1. Press PROGRAM
  2. Press a digit between 0 and 9
  3. Press PROGRAM again


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