TD 90227GB
2006-09-18/ Ver. C
System Installation
On Site Paging System
15
normal operation decreases the performance of the handset and also radically decreases
its battery operating time. Be sure that the battery saving time in the handset and the
Central Unit is identical.
Note:
Messages and alarms sent from the system to the handset, must be transmitted
with at least one repetition in order to secure a reliable system.
If a malfunction occurs, check that the functional indicators (LEDs) on all units show a
steady light. If not proceed as follows:
• No light: No power, check power supply. Hardware fault, contact your dealer.
• Slow blink (0.5 Hz): Program error. Restart the unit by switching the power off and on.
• Fast blink (8 Hz): Communication error. Check bus polarity and addressing of the unit.
• One blink every fourth second: Unit in test mode. Contact your dealer.
Check the coverage area by transmitting pagings (with speech if applicable) and compare
with the expected coverage area. If coverage is not as expected check the installation and
location of the antenna. If this does not help, contact your dealer. In multi-transmitter
installations each transmitter must be checked separately. This should be done by an
authorized technician.
10
Combined Systems
In combined 800/900 systems interconnection module T840IU is installed in the T840
central unit and connected to the OSP system bus via twisted-pair wiring (A and possibly
SP-buses).
Charging racks may be used separately, or connected to a T966CI charging interface if
high current charging and/or absent indication is desired.
Charging
Interface
Charging Rack
T840IU
Terminal
Transmitter
Central
Unit
Figure 16. Combined systems.
• Rack and interface are connected via a ready-made 12-conductor cable.
• Maximum distance between rack and interface is 1.5 m.
• Each charging interface has connections for four charging racks.
• The charging interface is connected to the A-bus if absent indication is desired.
