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National Communications
DOOR PHONE PERFORMANCE
DP5 is IDEAL for RESIDENTIAL USE or COMMERCIAL USE, where
ROAD NOISE is NOT HIGH.
It is not designed for INDUSTRIAL USE where ambient noise can be
constantly high.
The volume of the audio communication on the internal phones should
be comfortably audible (a similar level to a telephone call) providing :
•
The person at the Door Phone is talking directly towards the Door
Phone and at a distance of no more than 1 to 2 feet away (max 500-600
mm).
•
The Door Phone is mounted at a height of about 1.5 meters (5 feet). You
can mount at a lower level to allow for very young children, but volume will
suffer.
•
No plates or other material are placed over the front face of the Door
phone. Our Door Phone Cover accessory, Surface Mount Kit or a properly
designed Rain Hood will not affect performance.
The volume of the audio communication at the Door Phone should be
comfortably audible, providing :
•
There is not excessive road noise or other noise near the Door Phone.
This will affect the automatic gain circuit used in this device.
•
That high quality ADSL FILTERING is fitted ahead of the DS CONTROLLER
where ADSL is used on the same line. If you do not do so, volume in both
directions will be affected. Refer to your Door Station Controller User Guide
for detailed information on the use of ADSL with this product.
