Comdial DXP Plus Series, Руководство пользователя

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5.0 Connecting Data Devices
5.1 Selecting The Baud Rate
Each serial data communications port supports various baud rates, data bits, stop bits, parity, and flow control.
You can program these various options using the data base programming; however, the maximum baud rate that
you can assign to a serial data port varies depending upon whether you locate the communications card. Also, if a
device is transmitting/receiving data from the DXP Plus at a high rate, engineering sources recommend that you
use a communications protocol (such as RTS/CTS or XON/XOFF) to prevent buffer overrun and data loss.
Serial Data Port DXOPT–COM Location
Maximum
Baud Rate
Serial data ports 3–10 Lower two slots on the services board 19,200 Baud
Serial data ports 11–18
Lower two slots on:
the upper expansion cabinet interface board,
–or–
the lower expansion cabinet interface board,
–or–
the auxiliary board installed in the main cabinet.
9600 Baud
The maximum distance from a serial data port that you can confidently locate a data device is dependent upon the
baud rate at which you operate the serial data port.
•
When operating the port at 9600 baud, your data cable run must be no longer than 500 feet.
•
When operating the port at 19,200 baud, your data cable run must be no longer than 50 feet.
IMI89–190 Installing The Communications Card
8 – Installing The Communications Card