Cas Connection Less Than 50 Feet - AT&T MERLIN LEGEND System Reference Manual

System Applications
Hardware Requirements
Figure 3-1

CAS Connection Less Than 50 Feet

3-8 Call Accounting System
A typical CAS system consists of the following equipment:
An approved AT&T MS-DOS-based PC with the following configuration:
640K RAM
Hard disk drive with at least 3 Mbytes of available space for the
application software
parallel printer output
serial SMDR input
132- or 80-column parallel printer
D8W modular cord and 355AF adapter connecting the SMDR port on the
communications system to the COM1 serial port on the PC
MS-DOS system disk, version 3.3 or later
CAS software (CAS/H, CAS Plus)
The connection of CAS depends upon the distance between the control unit and
the PC used for CAS and whether or not the control unit and the PC are plugged
into the same AC power branch circuit. Figure 3-1 illustrates the connection
when the distance is less than 50 feet and the control unit and the PC are
plugged into the same AC circuit. Figure 3-2 shows the connection when the
distance is 50 feet or more or when the control unit and the PC are plugged into
different AC power branch circuits.