4 – Setup & Configuration ACS-160 Series & STL-160 Series T1 Multiplexer Installation & Operation
Version 2.11, August 2011
Harris Corporation 4-19
Intraplex Products
4.6 Redundant CM-5RB Modules (REDN Group)
Redundant CM-5RB modules have a special group added to the front panel user interface, called the
redundancy (REDN) group. This group is only visible on the backup CM-5RB module (it is suppressed
on the primary CM-5RB module). Depress the group switch on the backup CM-5RB module until REDN
appears.
This information also applies to the CM-5RTD redundant time delay common module. You can
remotely control the delay feature on the redundant CM-5RTD module (Section 4.7). However, there
are a few additional requirements for configuration of redundant time delay common modules. The
time delay function (TDLY) in the basic menu group and the time delay parameter (Topt) in the
advanced menu group must be configured identically on all CM-5RTD configurations. Also, the
multiplexer bus address (1-36) of each CM-5RTD module must be unique. Table 3-9 shows the REDN
group menu items and their parameters.
Table 4-9. REDN Group Menu Functions
Sub-menu Item Description
CNFG Configuration sub-menu
OFF Never switch to backup.
RVRT* Revertive switching – Switches to backup on detection of failure in primary; then
switches back to primary when failure condition is cleared.
NRVT Non-revertive switching – Switches to backup when failure is detected in primary but
does not switch back.
Exit Exit CNFG sub-menu.
SWCH Switching sub-menu – Displays backup or primary switch status. If SET/NEXT indicator light is green
(top), backup CM-5RB module is active. If light is red (bottom), primary CM-5RB module is active.
This switch can also be used to manually toggle from the backup to primary CM-5RB module or from
the primary to backup CM-5RB module.
LOF ON Loss of frame – Switch to backup if primary receives loss of frame condition.
OFF* Deactivates the LOF switching.
LOS ON Loss of signal – Switch to backup if primary is receives loss of signal condition.
OFF* Deactivates the LOS switching.
YEL ON Yellow alarm. Switch to the backup if the primary receives a yellow alarm.
OFF* Deactivates the YEL switching.
AIS ON Alarm indication signal. Switch to the backup if the primary is receiving an AIS signal.
OFF Deactivates the AIS switching.
* Indicates factory default.
Warning! The primary and backup CM-5RB modules must be identically configured on their user
interfaces. The backup CM-5RB module cannot automatically learn and configure itself to
the primary CM-5RB configuration. Section 1.5.1 – Function Groups and Configuration
Switches gives CM-5RB basic menu functions.
4.7 Optional Integrated CM-5RTD Time Delay (TDLY Group)
The TD-1 T1 Delay Module is now fully integrated into the CM-5RTD module, no longer requiring a
separate channel module. The CM-5RTD option provides a programmable time delay of between 6 and
131076 bit times (between 3.89 and 84.89 milliseconds) in the module’s receive path.
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