The dial terminal provides services that can be most
easily compared to that provided by a dial telephone
system. The dial telephones terminals (fig. 4-9) are
connected to ICSCs. They are used similar to a
commercial dial telephone with push-button dialing.
There are several types of accessories designed for
use with the dial and network terminals. These
accessories include headsets, handsets, spray-tight
enclosures that permit the installation of the terminals in
exposed areas, and loud speaker units. The loudspeaker
units (fig. 4-10) are designed for use with either the dial
or network terminals. Both units are equipped with
press-to-talk switches. Additionally, by depressing the
hands-free push switch on the unit, the operator can
communicate without using the press-to-talk switch.
This permits you to communicate without a handset or
SWITCHING CENTER (ICSC)
The ICSCs are the heart of the IVCS. They perform
the switching actions necessary to connect the calling
party to the called party, similar to the automatic
switchboards of a dial telephone system. Figure 4-11
shows the relationship between ICSC and the IVCS.
Figure 4-8.Network terminal.
Figure 4-9.Dial terminal.
Figure 4-10.Loudspeaker units.