Instruction manual

Page 1900 of 3156 Line Load Control
553-3001-306 Standard 10.00 January 2002
The selection of controlled stations is based on the Class of Service of the
station or trunk. There are four Class of Service options for LLC:
The control levels are enabled manually through LD entry and operate in a
hierarchical manner. Only one control level can be active at a time.
Progressive in sequence, each operating level restricts another class of
stations and the classes below it.
Figure 54 describes the hierarchical nature of LLC. Restrictions are based on
the number of originating calls blocked by the probability level set in the LD
program.
For example, when LLC S level is enabled, all stations with LLC 1 and LLC 2
Class of Service are limited by the feature, while LLC 3 calls function
normally. When LLC T is enabled, only those stations with LLC N Class of
Service are allowed to originate calls without restrictions.
Probability levels set by the LD program are whole numbers between 0 and
100. A probability set at 0 (the default value) means no call origins are
restricted for that Class of Service. A probability setting of 100 means all calls
are restricted when that Class of Service is enabled. Numbers between 0 and
100 are treated as a percentile of calls blocked.
During call processing, LLC screens calls to find the Class of Service for that
Directory Number (DN) and the active LLC level, and then decides if the
originating set is to receive a dial tone. Sets that are blocked during an LLC
level upgrade do not receive a dial tone.
• LLC N No LLC
• LLC 1 First LLC Class of Service
• LLC 2 Second LLC Class of Service
• LLC 3 Third LLC Class of Service