Simplex Or Bits Mode; Default Configuration - Black Box 202T User Manual

MODEM 202T
are 20 milliseconds pre-transmit delay, 60 milliseconds RTS to data, and zero
milliseconds RTS off delay at the end of the data. If adding Modem 202Ts to an
existing system with Modem 202Ts, a minimum of 100 milliseconds RTS to data
delay is required.
The Carrier Detect (Amber) LED on all remote modems in the system should be
on at all times. FSK data received at the remote will flash the Out (Green) LED
when data is sent out its RS-232 port. When a remote modem is transmitting, the
Data In (Yellow) LED will flash, and at the master modem the Carrier Detect
(Amber) and Data Out (Green) LEDs will flash.

3.4 Simplex or Bits Mode

In Bits mode, the Modem 202T sends data from a master to a remote(s) in one
direction only. In this mode, the modem is protocol- or format transparent and will
only operate in 2-wire mode. The data line is either a binary 1 or 0, producing a 1
or 0 at the receiving modem(s).
When connecting the modems to each other, use only the "2-Wire" connector
terminal block on all modems in the system.
With the Modems connected, the Carrier detect LED on the remote modem(s)
should be on at all times. The Carrier LED on the master will never be on. When
data is moving from the master to the remote modem(s), the Data In (Yellow) LED
on the master and the Data Out (Green) LED on the remote(s) will flash with the
data.

3.5 Default Configuration

The default configuration for the modem is:
Character Size: 10 bis/character (N, 8, 1)
Baud Rate: 1200
Carrier Frequency: Normal
Carrier On Select: DataSense
Modem Connection: 2-wire half-duplex
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