and restricted type G sets, except for the modular
Modular Telephone Set
connectors. Each enclosure has a schematic diagram
There are six models of the type G modular
(fig. 6-10) pasted inside it for convenience in
telephone set: a desk-mounted nonrestricted, a
desk-mounted restricted, a bulkhead-mounted non-
watertight nonrestricted, two bulkhead-mounted
nonwatertight restricted, and a bulkhead-mounted
watertight nonrestricted. Each model is comprised of
The type G (version 1) telephone set, due to its
two units: the telephone set and its respective enclosure.
simple design, requires very little preventive
The components and operation of the type G
maintenance. Most routine tests are performed during
normal operation of initiating and answering calls.
modular sets are identical to the basic nonrestricted
Figure 6-10.--Schematic diagram of the type G modular telephone set.