| AC VOLTAGE RATING | 115.0 VOLTS NOMINAL 1ST ALTERNATE OPERATING POWER RQMT |
| AC VOLTAGE RATING | 230.0 VOLTS NOMINAL 2ND ALTERNATE OPERATING POWER RQMT |
| CHANNEL FREQUENCY RANGE IN HERTZ | +500.0 TO 2050.0 |
| FREQUENCY RATING | 50.0 HERTZ NOMINAL 1ST ALTERNATE OPERATING POWER RQMT |
| FREQUENCY RATING | 60.0 HERTZ NOMINAL 2ND ALTERNATE OPERATING POWER RQMT |
| LINE TERMINATION TYPE | TWO-WIRE |
| LOOP ACTUATION CURRENT TYPE | DC |
| LOOP OPERATION TYPE | NEUTRAL OR HALF DUPLEX OR FULL DUPLEX OR POLAR |
| LOOP SELECTION DEVICE | SWITCH |
| OVERALL HEIGHT | 1.667 INCHES NOMINAL |
| OVERALL LENGTH | 5.000 INCHES NOMINAL |
| OVERALL WIDTH | 2.500 INCHES NOMINAL |
| MULTIPLEXING METHOD | FREQUENCY DIVISION |
| PHASE | SINGLE 1ST ALTERNATE OPERATING POWER RQMT |
| PHASE | SINGLE 2ND ALTERNATE OPERATING POWER RQMT |
| SPECIAL FEATURES | TY NO TC-21 SERIES |
| TOTAL CHANNEL QUANTITY | 4 |
| TRANSMITTING SPEED | 40 CYCLES PER SEC MAX |