2070-9x User’s Manual
Page 2
GERNERAL DESCRIPTION
The 2070-9xx is a 33.6Kbps dial-up
modem in a form factor designed for
use in a Model 2070 Controller.
It is compatible with other V.34
modems and is designed for traffic
control environments.
Located on the front panel of the 2070-
9xx is a RS-232 port that can connect
the dialup modem to a computer
through a female DB9 connector. This
port can also be connected to the
2070’s I/O bus.
The phone line connects to the 2070-
9xx through a standard RJ-11
connector located on the front panel.
A second RJ-11 connector is provided
for connection to a telephone.
The 2070-9xx can automatically
negotiate line rates from 300bps to
33600 bps.
All operating parameters such as
speed, etc., can be configured using
industry standard AT commands.
The serial port has a maximum speed
of 115.2 Kbps and is RS-232 and V.24
compatible.
The 2070-9xx cannot be used with
leased lines.
The SM336 also features Auto Answer,
Auto Dial, and tone or pulse dialing.
The 2070-9xx can be factory fitted with
a FSK Expansion Card. which is a FSK
Private wire Modem.. FSK stands for
Frequency Shift Keying which is a
modulation scheme that Shifts
(changes) the frequency to represent a
digital “1” (SPACE) or an “O” (Mark).
The FSK option can be configured for
the following baud rates:
2070-9A: 1200bps serial,
1200Hz/2200Hz Mark/Space
Frequencies, and 900Hz Soft Carrier
frequency
2070-9B: 9600bps serial,
11200Hz/17600Hz Mark/Space
Frequencies and 7800Hz Soft Carrier
frequency.
2070-9E: 19200bps serial,
19200Hz/38400Hz Mark/Space
Frequencies and 13800 Soft Carrier
Frequency.
PRELIMINARY