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Page 720 of 1536 Chapter 3 — DPNSS1/DASS2 features description and implementation
DPNSS1 Diversion
DPNSS1 Diversion is a British Telecom Network Requirement (BTNR)
supplementary service that provides full DPNSS1 Diversion signaling on
DPNSS1 links, when one of the redirection features listed below is invoked:
— Call Forward All Calls;
— Call Forward No Answer;
— Call Forward by Call Type;
— Call Forward Busy;
— Hunting/Group Hunting;
— Intercept Computer Call Forward All Calls;
— Call Forward Internal Calls;
— Meridian Customer Defined Network Call Redirection; and
— Call Party Name Display.
When a set activates a redirection feature such as Call Forward All Calls,
DPNSS1 signaling informs the call originating node that the call is being
forwarded to another set. If the forwarded party is located on another node,
the call originating node is requested to initiate a new call. When the
forwarded to party is reached by the call originator via DPNSS1, the
forwarded to party is notified that the incoming call has been forwarded.
As illustrated in Figure 108, Call Diversion functions on Meridian 1 nodes
that are linked to third party Private Branch Exchanges (PBXs) within a
DPNSS1 network. Meridian 1 gateway nodes provide links to other
Meridian 1 nodes by Meridian Customer Defined Network (MCDN) and to
Meridian 1 and third party PBX through DPNSS1. In this figure, the
Nominated party or forwarded to party, is reached through full DPNSS1 or
combined DPNSS1 or non-DPNSS1 (such as MCDN) routes.
553-3011-315 Standard 10.0 May 1999