Lucent Technologies DEFINITY ProLogix Solutions Overview page 176

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To support DCS customers, DEFINITY ProLogix Solutions can transport DCS messages over ISDN-
Primary Rate Interface D channels. As a result, you are not limited to private-line connections between your
various locations. You can also use the Software Defined Network (SDN) services.
The Software Defined Network supports all DCS features except the following:
All other capabilities and limitations associated with the DCS still apply.
AUDIX systems networked via DCS can also be supported over ISDN-Primary Rate Interface. (See Chapter
4 for more information.)
DEFINITY ProLogix Solutions Release 2 Overview 555-235-100
DCS attendant control of trunk group access
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DCS attendant direct trunk group selection
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DCS busy verification of terminals
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Distributed Communication System
Issue 2 June 1999 10-4