Verilink NCM 2000 (880-502623-001) Product Manual - Manual (Page 58)

Circuit Manager
4-2 Verilink NCM 2000
from the shelf and then re-inserted. To avoid this limitation,
do not unplug and reseat these cards after building their
circuits.
Modules
Supported for
Building Circuits
Currently the Central Circuit Database supports the following
modules: TAC 2010, DIU 2130, DIU 2131, DIU 2140, DIDCSU 2912,
DCSU, DPRI 2922, HDM 2180, HDM 2182, QPRI 2921, QUAD 2164,
IMUX 2160.
Circuit Manager Functions
The Central Circuit Manager performs the following functions:
• Preserves and restores circuits after a node is powered down.
• Builds and manages circuits, and also detects and resolves any
circuit resource conflicts.
• Performs special circuit backup applications such as the ISDN
dial-backup application.
• Preserves the configuration and circuits associated with a
module. For example, in case a module goes bad and is
replaced by a new module with the same equipment ID (front
panel model number), the new module will obtain the
configuration previously set to the old module and inherit any
associated circuits.
• Supports standby NCM backup with its database.
• Supports circuit building between Verilink legacy (TABS)
modules and new-generation (ACP) modules.
• Records configurations of modules installed in a node in a
data structure called the Central Circuit Database.
• Accepts user circuit-building input.
• Checks input information against static circuit-building rules.
• Applies dynamic circuit-building rules before activating a
circuit.
Alarm Handling The CCM "catches" every alarm received by the NCM module and
processes these alarms. Those selected alarms can be grouped into
certain categories. For example, the following alarms belong to the
node information alarm category:
• module present alarm
• module absent alarm
• shelf present alarm