Programming instructions

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DX-120 Programming Manual BASIC SYSTEM PROGRAMMING TASKS
Assigning Ancillary Devices -
Loud Bell, External Page, or Music on Hold
There is often a requirement to control ancillary devices via the telephone system. The DX-120 system provides one
dry contact closure (standard) for interface of the various devices.
CAUTION
It is important to adhere to the electrical requirements of this contact. The
contact closure is rated at 24vdc, 1Amp.
You can assign the contact closure to one of the following four uses.
• Loud Bell Control
Loud bell is used to activate the Loud Bell Feature, then specify which CO Groups to which the loud bell should
be applied.
EXAMPLE
When the phone rings in the warehouse, we want the loud bell set up to ring so that if
someone is standing just outside or in the back of the warehouse, they will hear the
phone ringing.
- If the system is installed in high noise environments, there is often a requirement to equip a loud (high-gain)
ringing device.
- Using the contact in this way provides for control of an optional, ancillary loud ringing device. The device is
connected to the contact as a trigger.
- When ringing occurs on CO lines in CO line groups designated for loud bell, the contact closure operates and
controls the connected device.
• External Page Control
This feature is used in conjunction with loud speaker so that announcements can be made over a P.A. system.
- The contact may also be programmed to control external paging apparatus.
- When programmed in this manner, the contact closure operates whenever the external paging port is
activated.
• Music Source Control
MS1 or MS2 is used if you want to use the BELL CONTACT (hardware set up) as an off/on switch (i.e., this
setting will also need the Loud Bell contact to be used).
EXAMPLE:
We have a Classical Music CD loaded in the CD player which is being used as Music
Source 1. But... we don't want the CD to be played constantly (as that would wear
out the CD quickly). Instead, we only want the CD to play when the system detects a
call on hold.
- The contact may also be programmed to control Message On Hold devices.
- In this mode of operation the contact closure operates whenever CO lines are placed on hold.
- This function can reduce wear on electromechanical devices that provide the message on hold function.
Assigning Ancillary Devices (continued on next page)