HYBRID SECTION Processor True digital. Second generation Texas Instruments. TMS320C25 processor. 8kHz sampling rate. Internal digital input and output gain processing, filtering. Trans-Hybrid Loss >40dB with pink noise or voice as test input, all dynamic enhancement processing switched off. With the override and output expander functions switched in, trans-hybrid loss is enhanced to >50dB. Send Level to Phone Line -lOdBm average level. Maintained by internal digital AGC. Send Audio Input XLR female connector. Active balanced. Accommodates -24dBm to +l2dBm levels in LINE mode; -68dBm to -35dBm in MIC mode. Front panel screwdriver level adjustment. Caller Audio Output XLR male connector. Active differential. Output levels to +1 4dBm depending on caller telephone line level and adjustment of front panel screwdriver level adjustment. Drives 600 Ohms. Aux/Mix Output XLR male connector. Active differential. In AUX mode, this output is an isolated second output. In MIX mode, this is a combined send and caller output. Input to Mix output: Unity gain. <0.04 % THD; +l2dBm clip point. Phone System Section Processor 80188 processor running software written in the "C" language. Music On Hold Input XLR female connector. Active balanced. I 0k~ input impedance. -20 to +4dBu level. An AGC circuit maintains consistent levels to held callers for any input level within this range. Communication Between Switch Console and Rack Mount Unit 9600 Baud RS-232 using six-conductor modular cable. Switch Console can be located up to 100 from the rack mount unit; 250 with the Local Power Supply installed. RS-232 Port 1200 Baud using "AT" style DB-9 connector. Simple ASCII commands are used for communication in both directions.

SYSTEM Frequency Response (caller to output) 200— 3400Hz, ±1dB. Noise and Distortion (caller to output) Distortion: Tipical 0.4% THD+N, measured @ 1kHz at any level from -48dBm to -8dBm. Signal-to-Noise:>72dB referenced to OdBm phone level. Included Accessories Manual with pull-out user instructions, 25 six-conductor modular cable for connection of Switch Console, and power cord. Rack Mount Unit Power Supply Universal, input switching operable from 85VAC to 250 VAC, 50Hz or 60Hz. Power consumption 30 watts. Incorporates surge suppression and line voltage "dip" protection. Rack Mount Unit Physical Dimensions Standard rack mount, one rack unit high. 9’%’ deep (23.8cm) Switch Console Physical Dimensions 3-3/16" x 12-3/4" x 4-1/4" 8.1cm x 7.0cm x 10.8cm Weight (rack mount unit and Switch Console packaged in single carton) 6 pounds (15 pounds shipping weight) 2.7 kilograms (6.8 kilograms shipping weight)