User's Manual

2
The Entrance Panel
This is commonly a model VRP or LCP series panel, being a flush mounting stainless steel
(BS316) vandal-resistant panel. The panel is fixed by tamper-proof bolts and is to be located
on the wall adjacent to the main entrance of the dwellings. The panel can be supplied in a
variety of sizes and with custom engraving details. A single flush type vandal resistant
button is provided for each flat and one for the timed entry of Services. A grill is also engraved
into the panel which conceals the Speech unit.
Model 51 Speech Unit
The Model 51 Speech unit is recommended for use with the BSX system. It provides full-
duplex speech between the front door and the telephone. It has a weather-resistant
plastic-cone loudspeaker for speech-out, and a dynamic, low frequency microphone for
speech-in. Both amplifier circuits (in and out) use a custom designed Hybrid circuit for high
reliability. The volume of each amplifier can be individually adjusted with two continuously
variable controls.
Telephones
The following telephone models are compatible with the BSX control ; 500D, 500X, 500XT,
500LX, and 500LXT.
Although the control unit will work with a variety of telephones the model 500X has been
designed specifically to take advantages of its facilities. The model 500LX telephone is
available for door monitoring having a second led to indicate when the door is open ( this
telephone requires 7 wires and must be installed with the CTX864 control ).
The model 500X telephone is completely manufactured in the UK for use in Public Housing
and specifically for the BSX system. The body is made of high impact ABS plastic, with a total
plastic moulding weight per handset being approximately 275 g. The handset cord is coiled and
has a sleeve at point of entry to the handset for longevity of life .
When called the resident needs only to pick up the handset to speak with the caller. The
speech circuitry is of high quality and includes the facility for the installation of an inductive
device to operate a hearing aid (switched to 'T') .
The telephone has a DC buzzer which is operated by an associated push button at the entrance
panel.The facility for extension bells, tones, and relays for switching lights etc. has been
included .
Residents may mute the buzzer by operating a button on the telephone; a red LED light
illuminates to remind them that the telephone is muted . Depressing the same button will
reconnect the buzzer and the red LED light will no longer be illuminated. Clear instructions
are provided on the cover. A second button on the telephone may be used to operate an
electric door release only after being called.