AT&T System 75 8520T User Manual download pdf (Page 86)

operation in the same status as when it sus-

pended operation-with these possible excep-

tions.

If an X-10 unit was ON, the system will not

turn that device ON again at restoration;

however, if a siren or relay was still ON

when operation was suspended, it will be

turned back ON when power is restored.

When power is restored, only new viola-

tions will be reported to the monitoring

service. Prior (before the suspend)

violations will be bypassed if the sensor is

still violated. Corrected violations that

occurred during suspend, like the opening

and closing of a door, will not be detected.

Suspend-related bypasses will be re-

moved when the Level of Protection is

changed by user.

Any violations that occur after the return to

operation will be treated in a manner

consistent with the system’s current Level

of Protection.

Any accessories that depend on System

8300 for power may need attention,

depending on their particular require-

ments.

Keypad Usage

More than one user can be using the keypads at

a time, but only one user may Program at one

time; others may set Level of Protection, use the

intercom, etc., and the CCU will handle the

instructions from each user as though that were

the only user working at that time, except when

the different commands interfere or disagree.

If one user sets the Level of Protection to DAY and

another sets it to OFF, the most recent command

will eventually be dominant.

If one user calls on the intercom, another user can

choose not to answer, can press [NEXT] and

perform whatever desired programming even

though the other user is trying to call.

Silence

.-J

(Keypads in the Bedroom)

If a user wishes to have a keypad in a bedroom or

office (where chimes, trouble beeps, and other

unnecessary sounds are not desired) you have

these two options. (1) The dip switch on the back

of the keypad (see Chapter 2, “Installation”) can

be used to cancel non-alarm sounds such as

intercom beep, chime, tone, trouble, and pre-

alarm (count-down) beeps. (2) The Volume (on

the side of the Display Control) or the Chime (on

the side of the Control) keypads will cancel the

phone ring, intercom beep, chime, tone, and exit

pre-alarm beeps (see the table at the keypad

installation section of Chapter 2).

NOTE:

Never use the dip switch to silence ALL keypads,

since that would mean the loss of the audible

Trouble warning.

Of course the Volume control also affects the

intercom and telephone volumes.

NOTE:

User can select intercom or phone at a keypad,

and still hear the sounds even if the volume

control is set all the way down.

Keypad as Telephone

The Display keypad operates as a “half-duplex”

telephone. This means that the user can either

talk or listen at any instant, but cannot simulta-

neously do both. It incorporates a noise level

sensor that will allow it to ignore (not send) any

constant-level noise in its environment. If the

system is configured as a pulse-dial system, the

user can temporarily convert to touch-tones for

bank-by-phone type operations by pressing the

star button.

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