AT&T MERLIN LEGEND Release 3.1 Installation Manual page 236

Call Management System
Considerations
You cannot connect a CMS in Behind Switch mode.
If a business requires more than 28 lines or employs more than 28 agents,
you can install up to two CMSs on a system to handle a second set of lines.
CMS operates on a dedicated PC with DOS, version 3.3 or higher.
The CMS supervisor's console is a Direct-Line Console.
CMS agents can use any MLX or analog multiline telephone that the system
supports.
You must connect agent telephones to the first 58 telephone jacks on the
control unit. (CMS allows only a 2-digit method to specify an extension
number; jacks 59 to 144 are designated by 4 digits.)
Because CMS is compatible only with 2-digit dialing, do not use flexible
numbering on any telephone associated with CMS.
The two CMS interface card ports on the PC must be connected to two analog
multiline telephone jacks on the same analog multiline telephone module;
these jacks must be operator positions. If two operator position jacks are not
available on the same module, another analog multiline telephone module
must be installed in the control unit to provide these jacks.
CMS trunks can be loop-start, ground-start, T1 emulated ground-start, or
Primary Rate Interface (PRI).
Up to four CMS external alerts can be used for agents and supervisors. For
example, an alert sounds if the number of calls waiting to be answered nears
a programmed threshold.
AT&T Attendant can be used to direct callers to the appropriate CMS group.
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Installing Applications