12
Telephone Communication Trouble
If the Keltron S/FDACT is unable to complete a telephone call to a receiving station DACR, because of
failure to obtain a receiver handshake tone (2225 Hz), failure to receive a positive acknowledgement for
each data block (2025 Hz), or for any other reason, then a communication trouble condition has been
detected:
The Telco fault LED corresponding to the telephone number currently being used illuminates, i.e.
the line #1 LED for the primary telephone number and the line #2 LED for the secondary
telephone number.
The common trouble relay energizes and the trouble contact active LED illuminates.
The audible device sounds the steady trouble signal.
The programmed (or default YS) comm # trouble event code is transferred to the SIA transmitter,
where # is 1 for the primary telephone number, and 2 for the secondary telephone number.
(see dialing operation)
The silence pushbutton may be used to silence the audible. The audible will automatically resound for
telephone communication trouble in 24 hours if the trouble condition is still present.
Configuration Trouble
The Keltron S/FDACT stores user programmable settings in non-volatile EEPROM memory. The content
of this memory is checked for integrity at power-up or reset, and whenever a new user configuration is
programmed. If the configuration memory becomes corrupted, the S/FDACT cannot perform any dialer
functions, since the stored telephone numbers and account numbers may be invalid. When configuration
trouble is detected:
The eight Class B zone LEDS (4 Red alarm, 4 Yellow trouble) each illuminate. This is to indicate
the non-functional status of the dialer, since under normal conditions a zone’s alarm and trouble
LED will never be lit simultaneously.
The common trouble relay energizes and the trouble contact active LED illuminates.
The audible device sounds the steady trouble signal.
Note that no SIA transmission is initiated.
The silence pushbutton may be used to silence the audible. The audible will automatically resound for
configuration trouble in 24 hours if the trouble condition is still present. Configuration trouble can usually
be corrected by reprogramming a configuration with the S/FDACT programmer utility. See Chapter 4.
