Figure 6-6.--Basic type G (R) restricted telephone set.

ringing voltage is applied to the telephone set terminal

on the tip (1) and ring (2) terminals. It is then bridged

to terminals 3 and 4.

For two-party service, a third wire (common ring

return) is used and connected to terminal 4 of both

telephone sets. Ringing voltage is then applied to one

telephone set across tip terminal (1) and terminal 4 and

to the other telephone set across ring terminal (2) and

terminal 4.

Restricted Telephone Set

The type G (R) restricted telephone set is used in

security areas where the chance of inductive coupling

of signals to the telephone set might compromise the

security established for that area. This telephone set is

equipped with a noise-cancelling transmitter, shielded

handset and deskset cords, and a push-to-talk (PTT)

switch. This set has a distinctive identification plate to

distinguish it from the nonrestricted set. The

identification plate has "Restricted" as the first line

and "(R)" after the type designation. The restricted

telephone set is also adaptable for high-noise areas

because of the PTT and noise-cancelling transmitter

features.

Figure 6-6 illustrates a basic type G (R) telephone

set. This set will fit the same enclosures as the basic

Figure 6-6.--Basic type G (R) restricted telephone set.

type G nonrestricted set. Figure 6-7 illustrates a

handset and cord assembly for the type G (R) set.

Figure 6-7.--Handset and cord assembly of the type G (R) set.

6-7