The Scope PageTek PT4-5-12V and PT4-10-12V are 12V DC powered, programmable radio paging systems which can be used to transmit both text and numeric messages direct to pocket pagers carried by individuals or entire groups. The unit is supplied with either 5 or 10 inputs, which can be hardware configured to accept either dry contact (no voltage) or voltage (5-18V DC) triggers. Each input is pre-programmed as either N/O (Normally Open), N/C (Normally Closed) or C/S (Change of State). Triggering any of the inputs (zones) will result in a pre-programmed message (up to 80 characters) being transmitted to the selected pager or group of pagers. The unit can be programmed to repeat transmit (1-5 repeat transmissions or until reset) if required. In addition, the trigger filter time can be defined between 100 ms and 25 s (period for which the zone must remain in the active state before triggering). One input (IN9) can be configured as a Reset to clear any current transmission cycles. This can also be used as an "Arm/Disarm" facility for the alarm inputs. Various other parameters can be programmed to suit specific user requirements.