
VISTA-128B Installation Instructions
25-2
1.
To prevent the risk of shock, disconnect phone lines at telco jack before servicing the panel.
2.
If the communicator is connected to a telephone line inside a PABX, be sure the PABX has a
back-up power supply that can support the PABX for 24 hours (Central Station usage) or 60
hours (Remote Station usage). Many PABXs are
not
power backed up and connection to
such a PABX will result in a communication failure if power is lost
.
U
L
The telephone line inputs have overvoltage protection in accordance with UL1459 as specified in
UL985/UL1023.
A Successful Transmission
When a control panel calls the central station receiver, it waits to hear a “handshake”
frequency from the receiver to confirm that the receiver is on-line and ready to receive its
message. Once the panel hears the handshake it is programmed to listen for, it sends its
message. The panel then waits for a “kissoff” frequency from the receiver acknowledging
that the message was received and understood.
Once the handshake frequency is received and understood by the panel, the panel will send
its message. If there is an error in the transmission (the receiver does not receive a “valid”
message), the central station receiver will not give the kissoff frequency.
The panel will make a number of attempts to the primary telephone number and a number of
attempts to the secondary telephone number (if programmed) to get a valid message through.
The number of attempts that are made to each number is set to 8 for each phone number. If
the panel is not successful after its numerous attempts, the keypad will display “Comm
Failure.”
Reporting Formats
The following chart defines the three sets of (handshake/kissoff) frequencies that the panel
supports and the different formats that can be sent for each.
FORMAT TIME HANDSHAKE TRANSMITS DATA KISSOFF TRANSMIT
Low Speed
3+1
4+1
4+2
1400Hz 1900Hz (10PPS) 1400Hz Under 15 secs.
(Standard report)
Sescoa/Rad
3+1
4+1
4+2
2300Hz 1800Hz (20PPS) 2300Hz Under 10 secs.
(Standard report)
Express
4+2
1400–2300Hz DTMF (10 cps) 1400Hz Under 3 secs.
High Speed 1400–2300Hz DTMF (10 cps) 1400Hz Under 5 secs.
Contact ID 1400–2300Hz DTMF (10 cps) 1400Hz Under 3 secs.
ADVISORY:
ADEMCO's Contact ID reporting is capable of uniquely reporting all 128 zones
of information, as well as openings and closings for all 128 users, to central stations equipped
with the ADEMCO 685 receiver using software level 4.4 or higher. Must be level 4.7 or
higher to fully support all new VISTA-128B report codes. 685 software levels below 4.4
cannot support Contact ID reporting. If you need to update your 685 receiver, contact your
distributor.
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