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6-14 DISTRIBUTED COMMUNICATIONS SYSTEM (DCS)
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RS449
DCP
MPDM
GENERIC 2
WITH
UNIVERSAL
MODULE
SYSTEM 75/G1
OR
TN760
(TIE TRUNK)
TN722
OR TN767
(DS1)
DCIU
SYSTEM 85/G2
WITH
TRADITIONAL
MODULE
TN754
(DIGITAL LINE)
PI
TN760
(TIE TRUNK)
TN722
OR TN767
(DS1)
DCIU
SN233
(TIE TRUNK)
ANN11
(DS1)
SIGNALING CHANNEL
ANALOG OR DS1 VOICE CHANNEL
Figure 6-19. Short Haul Digital Signaling: System 75/G1 to System 85/G2 — Direct Via MPDM
DIMENSION Signaling Links
DIMENSION signaling links are set up identically to System 85 and Generic 2 long haul and short haul
analog connections (see figures 6-11, 6-12, 6-14, 6-15, and 6-16).
TRANSPARENT FEATURES
When DCS is installed, only a subset of all the available communications system features are transparent
across DCS nodes. What follows is a discussion of the attendant, voice, and AUDIX features from which
you can expect transparency when DCS is properly installed.
Transparent Attendant Features
Attendants serving several DCS nodes/endpoints can all work at one location and still provide a complete
range of services. The attendant console with its alphanumeric display provides the following capabilities
and information about voice terminals and trunks. For these attendant features to work transparently, there
must be at least one direct tie trunk between the location where the attendants reside and each unattended
node. (See table 6-3 for a list of transparent attendant features and the communications systems from which
you can expect transparency.)
Attendant Call Waiting
This feature allows the attendant to queue a call for a busy single-line voice terminal. A distinctive tone
signals the busy terminal user that a call is waiting.