Specifications

Hardware and Software Parameters (continued)
Item Small Large
Pools (trunk groups)
Maximum number of pools
11 11
Maximum number of trunks in a pool 24 80
Pool buttons 56
64
Ports (not achievable simultaneously)
Delay announcements
32
32
Digital data via ISDN 7500B
Data Module
24
127
Paging
3
3
Voice and data (physical ports) 56
144
Voice Announce to Busy stations
28
127
Voice-mail interface* 20
20
Total ports
†
80
224
Power failure transfer telephones
6
20
* Although the system software supports up to 24 voice mail
interface (VMI) ports, all the VMI ports must be in the same
calling group, and the maximum number of stations in a calling
group is 20.
† The large system is said to have a total capacity of 224 (80 CO
lines/trunks plus 144 stations). However, these are physical
jacks. Each MLX station jack represents 2 logical endpoints
(ports). For example, an MLX telephone with a Multi-Function
Module (MFM) plugs into only 1 station jack, but the jack
supports the telephone and whatever is connected to the MFM
(fax machine, answering machine, etc.). The 1 station jack is
supporting 2 endpoints.
Although it has only 1 jack, the 100D module can serve up to
24 endpoints. Therefore, the entire large system can be
configured to connect up to 80 lines/trunks and 255 station
endpoints, a total of 335 endpoints.
This total of 335 endpoints exceeds the system’s capacity of
216 time slots. If more than216 endpoints are in use at the
same time, blocking can occur.
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