### SCO OpenServer Port Names for C/X, EPC/X and Xem Systems

Format used for port names:

/dev/tty cp, /dev/pr cp

tty | Base name
pr | Base name for DigiPRINT ports
c | Concentrator/EBI Module ID (a-z, A-Z) Lower case letters denote non modem control ports. These ports do not require DCD to be asserted before they can transmit data. Upper case letters denote modem control ports. These ports require DCD to be asserted before they can transmit data.
p | Port number on the specified concentrator or EBI module (01-64). Systems with a large number of ports may have to use some Concentrator/EBI module ID letters more than once; when this occurs, ports on the first concentrator or module to use an ID letter will be numbered 01-16, ports on the second will be numbered 17-32, etc.

#### Examples:

Port 4 on Concentrator 2 will be /dev/ttyb04. The same port with modem control is /dev/ttyB04. The corresponding DigiPRINT devices are /dev/prb04 and /dev/prB04.

If there are 28 concentrators/EBI modules, the 28th will also be assigned the ID letter "B"; Port 4 on Concentrator 28 will have the names /dev/ttyb20, /dev/ttyB20, /dev/prb20 and /dev/prB20.

Copyright © 1999, Digi International. All rights reserved.