AT&T MERLIN LEGEND System Reference Manual page 439

System Applications
New Application Features
Considerations
System Feature Interactions
Account Code Entry
Station Message Detail
Recording
Other features of CAS Plus include
processing of local and short-duration calls or only of calls that exceed a
certain cost
adding a service charge to calls before billing them to clients, departments,
or projects
Features for CAS that are new in the MERLIN LEGEND communications system
include displays that have pull-down menus and on-line help.
Only one CAS can be connected to the telephone system.
CAS operates on an approved AT&T PC operating with MS-DOS, Version 3.3
or later. The PC must be dedicated to CAS.
CAS collects detailed information on incoming and outgoing calls to and from
outside numbers only. It does not collect information on calls between inside
extensions.
CAS does not provide for the processing of automatic number identification
(ANl) information. However, the CAS-IS II does. (See "Integrated Solution II"
in this chapter.)
CAS handles call records up to 64 bytes; the number of calls depends on the
amount of available disk space. In its largest version, CAS records data for
up to 5,000 extensions and 15,000 account codes.
The account codes users enter before or during calls are used by CAS to
associate calls with accounts and individuals; these codes appear on CAS
reports.
CAS uses the call information provided by the communications system's built-in
SMDR feature to process calls.
Note: There are two formats for SMDR: basic and ISDN-PRI.
Call Accounting System 3-7