User manual

Product Description
Controller and DS3 Redundancy
2-18 July 2004 Wide Bank 28 DS3 - Release 2.4
Figure 2-8 Electronics Protection Mode of the Wide Bank 28 DS3
If revertive switching is enabled (revertive ds3 on), after a five minute delay the Wide Bank will
rearm the automatic protection switching. No automatic switchback will occur (as with Network
Protection) but if the currently active Controller malfunctions, another protection switch will occur.
If revertive switching is not enabled (revertive ds3 off), no protection switch-back will occur.
NOTE: Revertive switching (revertive ds3 on) has different effects for Electronic
Protection and Electronic and Network Protection. Please read both descriptions to
determine the differences.
Setting the Arm and Revertive Software Switches
Arm and revertive are interactive. They interact as follows:
 Arm and revertive can both be on (factory default)
 Turning revertive on also turns arm on
 Arm can be on when revertive is off
 If both arm and revertive are on, you cannot turn arm off (arm off command) without first
turning revertive off (revertive ds3 off command)
 If both arm and revertive are off, an arm on command only turns on arm
 If both arm and revertive are off, a revertive ds3 on command turns on both arm and
revertive
Active
(Primary)
M13 Mux
Controller
DS3OUT+
DS3IN+
28/21 LS
XMT Stream
28/21 LS
RCV Stream
xmt
rcv
Primary
DS3
Electronics Protection Mode
Standby
(Secondary)
M13 Mux
Controller
DS3OUT+
DS3IN+
28/21 LS
RCV Stream
28/21 LS
XMT Stream
Controller
Select
Disable
Enable