Out-Of-Band Signaling - Hirschmann MACH 4000 User Manual

Operation diagnosis

9.3 Out-of-band signaling

The signal contact is used to control external devices and monitor the oper-
ation of the Switch, thus enabling remote diagnostics.
A break in contact is reported via the potential-free signal contact (relay con-
tact, closed circuit):
Incorrect supply voltage,
the failure of at least one of the two supply voltages,
a permanent fault in the Switch (internal supply voltage).
The temperature threshold has been exceeded or has not been reached.
The removal of a module.
The removal of the ACA.
The defective link status of at least one port. With the Switch, the indica-
tion of link status can be masked by the management for each port
on page 72 "Displaying connection error messages"). On delivery, there
is no link monitoring.
Event in HIPER-Ring:
The failure of the redundancy (in redundancy manager mode). On deliv-
ery, there is no ring redundancy monitoring.
Event in the Ring/network coupling:
failure of the redundancy. On delivery, there is no ring redundancy moni-
toring.
The following conditions are also reported by the Switch in standby mode:
– Incorrect link status of the control line
– Partner device is in standby mode.
The management setting specifies which events switch a contact.
Note: With non-redundant voltage supply, the Switch reports the absence of
a supply voltage. You can prevent this message by feeding the supply volt-
age over both inputs, or by switching off the monitoring
"Monitoring correct operation via the signal
10
9.3 Out-of-band signaling
(see on page 12
contact").
(see
Basic - L3P
Release 4.0 11/07