The radios, telephone, and the switchboard discussed in this section are those presently on the NMCB Table of Allowance (TOA). To help you understand the component nomenclature and their family names, the following examples are provided:

. AN/PRC-77 and AN/PRC-104 radios

1. The AN indicates the users (Army/Navy).

2. The P indicates the type of installation (pack, portable).

3. The R indicates the type of equipment (radio).

4. The C indicates the purpose (communications).

5. The numbers 77 and 104 indicate the model numbers.

Figure 11-1.-Radio Set AN/PRC-77 components.

TA-312/PT and TA-1/PT telephones

1. The TA indicates the type of equipment (telephone apparatus).

2. The numbers 312 and 1 indicate the model numbers.

3. The P indicates the installation (pack, portable).

4. The T indicates the type and purpose of the equipment (telephone [wire] transmitting).

SB-22/PT switchboard

1. The SB indicates the type of equipment (switchboard).

2. The number 22 indicates the model number.

3. The P indicates the installation (pack, portable).

4. The T indicates the purpose of the equipment (telephone [wire] transmitting).