Rs-449 Network Interface - PictureTel Concorde 4500 Servicing Manual

See Appendix C, ÒElectronics Module Connections,Ó for
information on the V.35 network interface panel.
Note: This interface does not include a provision for dialing.
However, there are one or two RS-366A ports which can
be used to pass dialing information from the
videoconferencing system to the external network
device.

RS-449 Network Interface

The EIA RS-449 network interface is widely used in the United
States. The RS-449 network interface board uses the EIA RS-449
network interface ports to transmit data signals using the EIA
RS-422 balanced line data transmission standard. The EIA-449
interface uses a DC-37P connector for each of two network interface
ports to send and receive data and implement the RS-449 balanced
signal.
The RS-449 network interface operates at data rates from 56 to 768
kilobits.
The following are additional guidelines for the EIA RS-449 interface:
A balanced line data transmission method allows for
communication over distances of up to 1216 meters (4000 feet).
Supports transmit and receiver byte timing.
Use a Belden 9737 (or equivalent) cable.
The EIA RS-449 network interface must be used for external
F.Y.I.
F Y I
encryption.
Concorde¥4500 Network Interfaces
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