Specifications

Appendix B
Specifications
General Specifications
Data rate: 9600, 4800, or 0-1800 bps asynchronous
Data format: 8 or 9 data bits with 1 or more stop bits
DTE interface: EIA RS-232 or V.24 compatible
Line conditions: TELCO Voice band 4- or 2-wire leased line, conditioned or unconditioned
Private metallic circuits up to 9.5 miles (24 AWG) without cable equalizer. Up to 15.0 miles
(24 AWG) with TX and RX cable equalizer
Operating modes: 2-wire half-duplex or 4-wire full-duplex
Modulation: High-speed fast poll – Black Box proprietary
FSK, Bell 202T compatible
• Mark = 1200 Hz
• Space = 2200 Hz
• Soft Carrier = 900 Hz
Equalizer: Automatic, adaptive
RTS-CTS Delay: 23 ms. (fast poll)
8, 33, 59, or 219 ms (FSK)
Receiver
dynamic range: 0 to –30 dBm or –10 to –43 dBm
Operating
temperature: -40°C to +85°C
Surge protection: Leased line, up to 15KV
Carrier Control: Constant or switched, DIP switch selectable
Carrier loss
recovery: Train on Data
Throughput delay: Less than 10 milliseconds for fast polling.
Auto RTS: Support DTE without hardware RTS
(high speed only)
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