Honeywell Galaxy Flex Installer Manual page 139

Galaxy Flex Installer Manual
3=Snatch if Fail
2=Software
The ISDN module monitors every communication on the ISDN bus including those of other
devices. The software snatch can clear a B-channel when both are in use. The call that
started first is the one that is cleared.
Certain ISDN devices do not release the B-channel when a software snatch is attempted.
However, a hardware snatch can be attempted instead (see the Hardware snatch [56.3.04.1]
option). Software snatch can be enabled or disabled.
ISDN Autotest [56.3.05]
See Int Telecom Autotest [56.1.07] for details.
ISDN Engineer Test [56.3.06]
See Engineer Test [56.1.08] for details.
ISDN Line Fail [56.03.07]
The module continually monitors the ISDN line. In addition to DC volts monitoring, the
module can be programmed to use layer 1 check monitoring. The layer 1 option activates the
ISDN line every 40 seconds and monitors the activation response from the ISDN network.
This activation remains 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 module can be configured using these options:
1=None
2=Line Volts
3=Layer 1
4=Volts and Layer 1
5=Volts or Layer 1
Fail to Comm [56.3.08]
Use this option to set the number of unsuccessful communication attempts before the
COMM FAIL message 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.
A hardware snatch is attempted if the software snatch fails or the
software snatch is disabled.
No line monitoring.
D.C. volts monitored only.
Layer 1 monitored only.
Volts and layer 1 both monitored. Line Fail activated if both fail.
Volts and Layer 1 both monitored. Line Fail activated if either fail.
Communications [56]
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