BT&E Functional Blocks

Power supply

• Description of output ([an error occurred while processing this directive])

Ringing generator

• Ringing output ([an error occurred while processing this directive])
• Digital interface ([an error occurred while processing this directive])

Line switching

• BTE line card ([an error occurred while processing this directive])
• Trunk line card ([an error occurred while processing this directive])
• Backplane (holds line cards) ([an error occurred while processing this directive])
• Outside line to trunk card interface ([an error occurred while processing this directive])
• Phone tone generator ([an error occurred while processing this directive])

Computer Control/Software

• ``The Brain''--a 386/25 running Linux ([an error occurred while processing this directive])
• Interface to Backplane and Ringing Generator ([an error occurred while processing this directive])
• Tone Decoder Card ([an error occurred while processing this directive])
• BTE system software ([an error occurred while processing this directive])
• BTE Services ([an error occurred while processing this directive])
• Standard Phone Event Timings ([an error occurred while processing this directive])