Specifications

Installation and Operation Manual Chapter 1 Overview
DXC-100PSX Physical Description 1-3
Term Meaning
Broadband Redundant Card This card resides in the protection switch and is used to back up a
broadband application module; it must reside in slot 11 or 7.
Controller Card Provides communications between the DXC-100 System Manager and the
protection switch.
N+1 Device Redundancy (NDR) A redundant device is provided to replace a failed primary device in a
group.
N+1 Device Redundancy Group
(NDRG)
A collection of configured primary devices and a redundant device that will
be used for redundancy.
Narrowband Primary Card This card resides in the protection switch and is used to back up a
narrowband application module in slots 2, 3, 4, 5, 6, 7, 8, 9, 10 or 11.
Narrowband Redundant Card This card resides in the protection switch and is used to back up a
narrowband application module; it must reside in slot 1.
Primary Device A device in a redundancy group that would normally carry traffic.
Primary Slots (DXC-100) Cards plugged into these slots are considered active and on-line under
normal operation.
Primary Slots (Protection Switch) Holds interface cards for the cards plugged into the DXC-100 primary slots.
Protected Device This is a primary device that will be replaced by a redundant device should
it fail within its redundancy group.
Redundant Device One device in a redundancy group that has been configured to replace or
substitute for a failed primary device in the redundancy group.
Restore An action that occurs when traffic is returned to the primary device that
was being protected in the redundancy group by a redundant device.
Standby Slots (DXC-100) Cards plugged into these slots are considered inactive and off-line under
normal operation. They become active and go on-line when a card plugged
into the primary slot becomes non-operational.
Standby Slots (Protection
Switch)
Holds interface cards for the cards plugged into the DXC-100 standby
slots.
Switchover An action that occurs when a redundant device replaces a primary device
that failed.
Protection Switch Components
The DXC-100PSX, shown in 0 Figure 1-1 installed in its position over the protected
DXC-100, contains:
• Eleven slots for
Interface Cards - these cards provide the functionality to
switch to the DXC-100 primary or redundant slot. They are physically
connected via primary or standby adapter cables to the DXC-100. The
Protection Switch network connections come into this card through the
Primary Adapter Cable .
• One slot for the fail-safe
Controller Card - provides communications between
the DXC-100 System Manager and the Protection Switch. The Controller Card