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Chapter 3 — DPNSS1/DASS2 features description and implementation Page 727 of 1536
Feature operation
Activating Call Forward All Calls over DPNSS1
Set A invokes Call Forward All Calls (CFAC) to Set B, the forwarded to party
over a DPNSS1 network. In a non-DPNSS1 network environment, then the
Call Forward All Calls is normal operation.
1 If the dialing plan reaches Set B via DPNSS1, a VALIDATION
REQUEST is sent to Set B. The CFAC key remains flashing.
2 Upon receipt of the request, Set B’s node responds to the validity of Set
B’s DN. If the DN is valid, the CFAC feature is activated. The CFAC key
is lit. However, if the DN is not valid, Set A hears an overflow tone, and
the CFAC key remains flashing.
3 If the forwarded DN is local or reached through a non-DPNSS1 network,
the usual CFAC activation process applies. No DPNSS1 messaging
occurs.
DPNSS1 Executive Intrusion
Digital Private Network Signaling System 1 (DPNSS1) Executive Intrusion
enables an originating party to break-in to an established call under certain
circumstances. The Meridian 1 only allows this feature to be activated from
Attendant Consoles; however, it will accept an Executive Intrusion activation
request from a regular set on a third-party PBX.
For the purposes of this feature description the term “requested” party will be
used to describe the person on the established call who the originating party
desires to talk with, and the “unrequested” party will mean the person on
other end of the call. On an Option 11, Executive Intrusion is only activated
if the attendant places the call to the requested party over a DPNSS1 link. If
the attendant and the requested party are located on the same node, the current
Attendant Break-in feature is activated. Executive Intrusion is activated by
using the existing Break-In key on an Attendant Console.
When an attendant presses the Break-In (BKI) key to invoke Executive
Intrusion, the node where the requested party resides checks the Intrusion
Capability Level (ICL) of the Attendant Console against the Intrusion
Protection Levels (IPLs) of the parties involved in the call. If the ICL is higher
than the IPLs, Executive Intrusion is allowed and a conference is set up
between the attendant, requested, and unrequested parties.
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