BSX Isolated Audio Entry System
PD-142 Issue 1
Installation and Operating Manual
Page 24 of 32
Troubleshooting Speech Problems
The objective of this section is to verify the correct operation of speech from the picking up
of the ringing phone. All previous sections are assumed to be correct and working.
The BSX2 PCB detects a phone going off hook, stops ringing and changes the DDA
indicators from “Ring” to “Speak”, speech should then be active.
Test:
Ring a phone, listen at the door, then pick up the handset to verify speech.
Phone keeps ringing quietly.
T core broken between phone and panel..
61 Speech unit is faulty.
One way speech from door to
phone only.
Short circuit or broken T connection
Speaker volume turned down on Speech Unit.
Check Model 61 Speech unit (see below)
Check Phone by substitution (or see below)
One way speech from phone
to door only.
Short circuit or broken R connection
Microphone volume turned down on Speech Unit
Check Model 61 Speech unit (see below)
Check Phone by substitution (or see below)
Speech volume too low.
Adjust speech volume control on Model 61.
Model 61 speech unit not aligned with holes in panel
Loud ‘howl’ at the entrance
panel. (Acoustic feedback).
Model 61 volume controls set too high.
Short-
circuit from “R” to “T”
Alarm cable
used or “R&H” or “R&O” not in twisted pair
“R” twisted
with “T” instead of “H” or “O”
Other noise or interference
audible at the entrance panel.
Alarm cable used
Adjacent data cable
Testing Phone and/or Speech unit
To test either a phone or a speech unit ensure 12VDC is correct at C (+) & H (-), then
temporarily connect R O T of the speech unit to R O T of the phone with a short length of
cable, removing existing connections first.
Note 1:
The BS-LX phone also requires V connected to C to operate.
Note 2:
The BS-LX and 801P phones will only work for two minutes after being rung, so
momentarily connect C to I or V to I.
There may be some feedback as the phone is very near the speech unit, but it should be
possible to prove two way speech even without the help of a second person.
Mute Led does not come on.
Phones with a ring LED need 12V on V.
Mute is disabled on the settings switch.
