System Capacities - AT&T MERLIN LEGEND Installation & Maintenance Manual

System Description

System Capacities

The system comes in two sizes, large and small. The large
system supports up to 80 central office (CO) lines/trunks and 144
stations, such as telephones and fax machines, and the small
system supports up to 24 CO lines/trunks and 56 stations. The
size of the system is determined by its memory capacity—that is,
the processor module (including the feature module) located in
the control unit (CU).
The large system has a total capacity of 224 jacks (80 CO
lines/trunks plus 144 stations); however, each MLX module
station jack supports two logical endpoints (station devices that
can operate simultaneously and independently). For example, an
MLX telephone with a Multi-Function Module (MFM) plugs into
only one station jack, but the jack supports the telephone and
the equipment connected to the MFM (such as a fax machine or
an answering machine).
In a similar way, although the 100D module has only one jack, it
can serve up to 24 endpoints (emulated lines/trunks or ISDN-PRI
lines/trunks).
Thus, the large system can be configured to connect up to 80
lines/trunks and 255 station endpoints, a total of 335 endpoints.
Note: The system has a time-slot capacity of 216. If more than
216 endpoints are in use at the same time, blocking can occur.
Table 1-8 lists the capacities of the system's hardware and
software components for both small and large systems.
System Capacities 1-35