CDM-750 Advanced High-Speed Trunking Modem
Revision 2
Front Panel Operation
MN-CDM750
5–58
5.2.7.4 Utility: 1:1
1:1 Manual/Auto Force
Use
the
W
X
arrow
keys
to
select
Manual/Auto
or
Force
,
and
then
press
ENTER
.
Note
the
following:
Selection
Description
Manual/Auto
(
Use
the
ST
arrow
keys
to
select
Manual
or
Auto
,
and
then
press
ENTER
)
Manual
The currently online modem remains online regardless of any current or future
faults. Online and offline modems remain in this state until you
Force
the
switchover.
Auto
The redundancy switch chooses which modem is online based on fault conditions:
•
If the original online modem, Unit ‘A’ becomes faulted, then switch occurs to
the offline modem, Unit ‘B’ only if it is fault-free.
•
Operation can not revert back to the original online modem, Unit 'A, until it
clears its faults.
•
Switchover back to Unit ‘A’ occurs only if the new online Unit ‘B’ becomes
faulted and Unit ‘A’ is clear of any faults.
Force
(
press
ENTER
to
force
switchover,
subject
to
the
conditions
specified
here)
The conditional states for forced switchover are identified on this screen as
follows:
•
1:1 redundancy is Not Connected
This message indicates that the modem’s rear panel
J2 | REDUNDANCY
connector is not connected to a supported 1:1 redundancy switch such as the
CRS-170A or CRS-180.
•
This Unit is in Standby (1:1 only)
This message indicates that the modem is properly connected to a supported
1:1 redundancy switch but the modem is the backup. You can only “Force” a
switch to the backup by forcing the Online modem to go Offline. You can not
force the backup to go online.
•
Press ENTER key to force Unit into Standby (1:1 only)
This message indicates that the modem is connected to a 1:1 switch and the
modem is online. Press
ENTER
to force this modem offline and bring the
alternate modem online.
5.2.7.5 Utility: 1:N
1:N Redundancy: Disabled
Use
the
ST
arrow
keys
to
select
1:N
Redundancy
as
Enabled
or
Disabled
,
and
then
press
ENTER
.
If
the
unit
is
connected
to
a
Comtech
EF
Data
CRS
‐
500
M:N
Redundancy
System
(as
part
of
a
1:N
system),
this
setting
must
set
to
Enabled
.
In
all
other
circumstances
(i.e.,
standalone
operation
or
1:1
Redundancy),
1:N
Redundancy
must
be
set
to
Disabled
.
Summary of Contents for CDM-750
Page 76: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Updating Firmware MN CDM750 4 12 Notes...
Page 224: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Appendix A MN CDM750 A 4 Notes...
Page 234: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Appendix B MN CDM750 B 10 Notes...
Page 256: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Appendix C MN CDM750 C 22 Notes...
Page 280: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Appendix D MN CDM750 D 24 Notes...
Page 300: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...