Honeywell Galaxy Dimension Series Installer Manual page 204

Galaxy Dimension Installer Manual
56 - Communications (cont'd)
ISDN network. This activation will remain for about 20 seconds. When X.25 is used the layer 1 check is not
performed because the ISDN line is already activated continuously.
The ISDN module can be configured to report a line fail when either one or a combination of the volts and
layer 1 checks fail. The options are:
1 = None
No line monitoring
2 = Line Volts
DC volts monitored only
3 = Layer 1
Layer 1 monitored only
4 = Volts and Layer 1
Volts and layer 1 both monitored. Line Fail activated if both fail.
5 = Volts or Layer 1
Volts and Layer 1 both monitored. Line Fail activated if either fail.
56.3.08 Fail to Comm
This option determines the number of unsuccessful communication attempts before the COMM FAIL mes-
sage is recorded in the event log.
When an alarm condition or event is to be transmitted to the monitoring station, the ISDN module snatches the
telephone line and dials the programmed telephone numbers. This procedure is repeated for the second
telephone number if the Receiver option has been programmed as Dual.
NOTE: The ISDN module communicator snatches and holds the line until a successful attempt has been
made to the required telephone numbers or all the repeat attempts have been tried.
If the communication attempt is unsuccessful, the communicator waits for a short period before redialling the
number (or the second telephone number if the Receiver option has been programmed as Dual or Alter-
nate). When the Fail To Communicate option is left at the default setting of 3, if the first three dialling at-
tempts are unsuccessful, the COMM FAIL message is recorded in the event log and the alarms to be trans-
mitted are erased from the buffer.
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