Interaction; Overload Control Support - Nortel Meridian SuperNode SL-100 Reference Manual

6-8 Feature implementation
recovery for the DLM occurs for the entire DLM node and the two individual
units.
IPE units are grouped with other IPE units for broadcast-loading by the
following criteria:
•
•
The system maintains these static groups automatically over time as datafill
changes. The SRC builds dynamic groups (subgroups) of these static groups
as needed during recovery activities.
As an example of static grouping, the system puts two DLMs or IPEs that have
the same load-file name, but subtend different C-side XPM node types into
different groups.

Interaction

This section describes the interactions between the IPE Auto Recovery feature
and other functionalities.
The SRC coordinates the broadcast-loading of each member of the group. It
also monitors and controls the number of concurrent PM loading tasks.
Manual intervention through the MAP terminal can override any recovery
activity. Only the ABTK and BUSY commands (with the Force option) permit
manual intervention on the IPE. When used, the user is notified and prompted
to continue.
For more information about features, refer to the Commercial Systems Feature
Description Manual or the DSN Feature Description Manual. For more
information about the DLM Auto Recovery feature, refer to the Digital Line
Module (DLM) Reference Manual.

Overload control support

Overload control support is a term used to describe a method of controlling
message flow to and from the IPE. The objective of overload control is to
provide continued processing of calls at maximum capacity during peak traffic
periods.
At times of peak traffic, an IPE may run out of memory buffers first because
the processor of an IPE is data store constrained rather than real time
constrained. Work that arrives in the IPE sometimes needs to be queued up
555-4001-129 Standard 08.01 November 2000
load-file name
C-side Extended Peripheral Module (XPM) node type
— Remote Cluster Controller (RCC), Remote Cluster Controller (RCC2)
— Line Group Controller (LGC), ISDN Line Group Controller (LGCI),
Line Trunk Controller (LTC), and ISDN Line Trunk Controller (LTCI)