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DPNSS 1 services
The Digital Private Network Signaling System (DPNSS 1) is a networking protocol enhancement
that extends the private networking capabilities of existing Business Communications Manager
systems. It is designed to offer greater centralized functionality for operators, giving them access
to Business Communications Manager features over multiple combined networks.
Note: The DPNSS feature is dependent on which region loaded on your system at startup and that
a software keycode was entered to enable the feature.
Other information in this section includes:
•
"DPNSS 1 capabilities" on page 551
•
"DPNSS 1 features" on page 552
•
"Private networking with DPNSS" on page 559
DPNSS 1 allows a Business Communications Manager local node, acting as a terminating node, to
communicate with other PBXs over the network. For example, corporate offices separated
geographically can be linked over DPNSS 1 to other Business Communications Manager nodes,
bypassing the restrictions of the PSTNs to which they may be connected. This allows connected
Business Communications Manager nodes to function like a private network, with all features of
Business Communications Manager accessible.
TIPS: Business Communications Manager DPNSS 1 works as a terminating node only.
Business Communications Manager to Business Communications Manager DPNSS is not
supported.
DPNSS 1 features can be used on any Business Communications Manager telephone. On most
Business Communications Manager telephone, you must use specific keys and/or enter a number
code to access the features.
DPNSS 1 capabilities
A single Business Communications Manager node, acting as a terminating node on the network,
supports the following capabilities over DPNSS 1 lines:
•
Direct Dial Inward (DDI) for incoming calls.
•
Originating Line Identification (OLI) for incoming and outgoing calls:
— For incoming calls, the Calling Line Identification (CLI/CLID) information is displayed to
the user on telephones with line display This must be configured in programming.
— For outgoing calls, the directory number of the originating party is sent out as OLI.
•
Terminal Line Identification (TLI) for incoming and outgoing calls. Referred to as Called Line
Identification.
•
Selective Line Redirect (SLR) and External Call Forward (ECF) implemented on calls
between DPNSS 1, and BRI/PRI, DASS2, and Analog lines.
DPNSS 1 services
Programming Operations Guide
551
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