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User’s Manual - SM19202 Fast Poll Modem
Appendix B
Specification
s
General Specifications
Data rate:
19200, 9600, 4800, 2400, 0-1800 (Bell 202T), or 0-1200 bps (V.23)
asynchronous
Modem Training Time:
(RTS-CTS Delay)
17.4 ms. (fast poll at 19200 bps)
23 ms. (fast poll at 2400/4800/9600 bps )
8 or 33 ms (Bell 202T)
33 ms (V.23)
Data format:
8 or 9 data bits with 1 or more stop bits, or 7 data bit with parity bit
DTE interface:
EIA RS-232/V.24, or RS-485 (2-wire HD or 4-wire FD) compatible
Line conditions:
TELCO voice band 4- or 2-wire leased line, conditioned or unconditioned
Private metallic circuits up to 9.5 miles at 9600 bps (24 AWG) without cable
equalizer. Up to 15.0 miles (24 AWG) with TX and RX cable equalizer. Up
to 25 miles for FSK modes.
Operating modes:
2-wire half-duplex or 4-wire full-duplex over leased or private line
Modulation:
QAM High-speed fast poll mode
FSK, Bell 202T or V.23 compatible
•
Mark = 1200 Hz (1300 Hz, V.23)
•
Space = 2200 Hz (2100 Hz, V.23)
•
Soft Carrier = 900 Hz (Bell 202T only)
Equalizer
Automatic, adaptive
Receiver dynamic range:
0 to –30 dBm or –10 to –43 dBm
Operating temperature:
-40
°
C to +85
°
C
Power supply:
Wide range switching power supply:
•
SM19202FP (AC version): 90 to 265 Volts AC, 50/60 Hz, single
phase or 90 to 400 VDC
•
SM19202FP-DC (DC version):10 to 60 Volts DC
Surge protection:
Leased line, up to 15KV
Carrier control:
Constant or switched, DIP switch selectable
Carrier loss recovery:
Train on data automatically
Throughput delay:
Less than 10 milliseconds for fast polling
Auto RTS:
Support DTE without hardware RTS
