Triplett TeleTalker 330 – PN: 3330 - Manual (Page 5)

4
Operation
Connection:
Modular and alligator clip connections are provided. For modular
connections, remove the headset plug at the base of the handset and
plug the modular cable directly into the TeleTalker. See Figure 1.
Alternately, use the 5 way test clips to connect to telephone terminal
blocks, bare wires, or insulated wires (using wire piercing
pincushions).
Keypad:
Use the keypad to dial any outgoing number. Figure 2 shows the
layout. Keys are provided for the stored memory function (MEM and
STO) and Last Number Redial (RD/P).