Simultaneous send and receive instrument checks level from -70 to +15 dBm and frequency from 100 to 60,000 Hz. Filters used are C Message, 3 kHz, 15 kHz and 1010 notch. Preset and variable settings. Terminates at 135, 600 and 900 ohms. Monitor speaker. Talk/dial/hold capable. 310 jacks. Bell Pub 41009. Power is -48 VDC with 115 VAC, -24 VDC options. Single rack space, 19/23". Weight 7 lbs.

Check our BRIGHT ID'er Huge Caller ID Display - You can see it 20-feet away.