Natcomm
Page 17
HANG UP AFTER DIAL OUT
DS5 incorporates a HANG UP TONE DETECTOR which is designed to detect
‘AUSTRALIAN’ specification hang up tones that will be present at the completion of
a Door Phone call. This process is fully automatic.
When installed on PBX systems, the Hang Up tone generated may be outside of the
cadence and frequency normally used in the AUSTRALIAN for Hang Up tones. In
this situation, DS5 may not hang up until the Maximum Door Phone Call Time has
elapsed. Our Hang Up detector, looks for:
1.
A Tone Frequency between 200Hz and 600Hz.
2.
Tone Duration between 300mS and 600mS.
3.
A 50% Duty Cycle +/- 20%
(ie ON and OFF periods should be the same +/- 20%)
You can adjust your PBX system to generate Hang Up tones as per the above
specification, or to output normal AUSTRALIAN Hang Up tones.
OR
You can PRESS ANY TOUCH TONE NUMBER digit (0 to 9) on your telephone to
cause an immediate disconnection of the call.
AND/OR
You can set the Maximum Door Phone Call Time to a time less than 99 seconds but
which is still long enough to communicate with your visitors. DS5 will terminate all
Door Phone calls at this time setting.
ELECTRO MAGNETIC INTERFERENCE
Electromagnetic Interference (EMI) from some Switch Mode Power Supplies and
some low end UPS units (Uninterruptable Power Supplies) can prevent hang up
tones being detected by DS5. Switch Mode Power Supplies are easily identified
because they do not use a transformer and are very light.
If you experience a problem, TURN OFF any SWITCH MODE POWER SUPPLIES
located near DS5 (and its power supply) and test if the problem is resolved. If the
DS5 Power Supply is connected to an Uninterruptable Power Supply, remove it and
test if the problem is resolved.
IMPORTANT NOTE
Immediate Hang Up can also be achieved by simply pressing ANY Touch Tone Number key (0 to 9)
on your telephone at the end of a call. Note : # and * cannot be used for this function.