Supports all high speed data, produces name or name and number caller ID data- Audio input/output for recording voice prompts- 40 V DC talk battery- Precise call progress tones dial tone, ring back, fast and slow busy, SIT, and re-order tones- Standard and distinctive 20Hz AC ringing- Provides CPC breaks after disconnect- Touch Tone detection- Ringdown mode no Touch Tones required- 911 trainer mode for classroom training