Telephony
300PBX-SC Station Level Paging Adapter
- Paging by calling a dedicated extension
- Powered by a phone line connection
- Type 1 enclosure
- FCC Approved

The 300PBX-SC telephone system interface allows access from a PABX (Private Automatic Branch Exchange) to a SelecTone® system or centrally amplified paging system. A single standard RJII modular jack is the only input required.
The 300PBX-SC is assigned a dedicated line in place of a telephone. By dialing the extension to which the 300PBX-SC is connected, direct paging access is made to the SelecTone command unit. When the connection is made, a tone is sounded both in the phone and the SelecTone speaker amplifiers. The 300PBX-SC will automatically disconnect when the dial tone is heard or after the pre-determined time limit has expired.
The Model 300PBX-SC includes both an audio output and a double-throw relay circuit to activate the music mute or other function during page. The audio output is a 600 ohm balanced line for direct connection to an audio amplifier. A high impedance output with level adjust is also provided. The controls can adjust the Alert Tone Level, Paging Access Time, Dial Tone Sensitivity and Dial Tone Trip Time.
The cadmium-plated housing can be mounted to most surfaces by means of a #6 screw through the holes in the mounting flanges.
Federal Signal's 300PBX-SC Station Level Paging Adapter saves money by linking an existing phone system to a public address system or SelecTone system.
Models
| Part # | Description | Shipping Weight | Net Weight | |
|---|---|---|---|---|
| 300PBX-SC | Station level paging adapter | 2 lbs. | Add to Quote > |
Accessories
| Part # | Description | Ship Weight | |
|---|---|---|---|
| NOT APPLICABLE | |||
Agency
| NO DOCUMENTS FOUND |
Diagrams

Specifications
| Voltage | Powered by the phone connection |
|---|---|
| Mount | Surface |
| Input Connector | RJ-11 RJ-13 |
| Output Connector | RCA Unbalanced Screw Terminals |
| FCC Ringer Equivalence | 1.3B |
| Ring Detection | 15.3 - 68Hz, 40-150VAC |
| Loop Current | 90mA Maximum |
| Alert Tone Frequency | 600Hz |
| Dial Tone Frequency | 350Hz |
| Page Access Time | 5-30 Seconds |
| Output Impedance | Hi-Z (22 Watt Minimum) 600 Watts |
| Output Level | -0.5dB without Internal Termination -5.0dB with Internal Termination |
| Relay Ratings | SPDT, 1A Contacts |
| Controls | Output Levels Alert Tone Level Dial Tone Sensitivity Dial Tone Trip Delay Page Access Time |
| Enclosure Rating | Type 1 |
| Height | 6.125 IN |
| Width | 3 IN |
| Depth | 1.25 IN |

