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Scope DataPage UHF MK2 Radio Paging System
Description:
Your DataPage Mark 2 is supplied in one of three configurations:
1) NDP, the basic model, provides keyboard entry of data for message transmission.
Additionally, two volt-free (dry) contacts are provided for sending pre-programmed
messages. These contacts can be programmed for normally open, normally closed or
change of state operation (see page 3, Dry Contacts).
2) NDPDTMF: as above, with the addition of an interface suitable for connection to an
internal telephone system that is driven by DTMF tones i.e all internal telephones on the
internal exchange must be capable of sending dual tone multi frequency signals (DTMF)
from their own keypads to the extension socket selected to operate the paging system.
The vast majority of PABX telephone exchanges operate in this way.
3) NDPLP: as above, but for connection to keyphones and hybrid systems that use four
wire telephones and their own proprietary digital signalling protocol. In most cases, these
systems will not be able to send DTMF tones from all internal telephones to the selected
internal two wire extension socket. The NDLP model is therefore configured for
connection to a spare external line port by way of the AB wire. The telephone exchange
must then be programmed such that this line port is not automatically selected when
requesting an external line, but the internal extensions can select this line port either by
way of a pre programmed feature button or dialling a discreet code. This line port system
will work with all exchanges which will accept that the line port is active from the correct
line voltage being present. This system will not work where the exchange requires the line
port to receive digital dial tones .
Refer to Section 2: "Telephone Interface" for more comprehensive information.
Some major points to remember when installing the equipment:-
♦ Never install aerials near to overhead power lines or adjacent to telephone or public
address or data communication lines.
♦ Avoid, wherever possible, running aerial feeder cables alongside other cables eg:
telephone and mains.
♦ Avoid mounting the transmitter in the immediate vicinity of telephones, exchanges or
computer equipment. A few feet can make the world of difference in avoiding
interference from the radio frequency generated by the transmitter.
DPMK2/6
4
07/05
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