ASCOM Ascotel 2025 - Page 80

ascom Ascotel 2025/2045/2065
HBT_20321104_01/B0_en Networking the Systems 1.25
Networking Technology Terminology
Before the basics of private networking are explained, the table below defines the
key terminology for networking technology:
Tab. 1.4: Networking technology terminology
Abbr. Term Explanation
– Exchange Short for
® public network
– Break-in An external incoming
® DDI connection for a PISN subscriber is
routed into the
® PISN at the ® PINX that is closest to the caller.
– Break-out An outgoing external connection is routed into the public ISDN
only at the PINX that is closest to the call destination.
CTX Centrex The designation Centrex, for Central Office Exchange Service, is a
product name which some network providers use for the services
provided by the
® virtual PBX.
DSS1 Digital Subscriber Signalling 1 Signalling protocol for ISDN networks (also called Euro-ISDN)
DDI Direct Dialling In DDI numbers enable internal subscribers to be reached directly
from a public network. In the direct dialling plan the end portion
of a call number is allocated to the number of an internal subscrib-
ers or
® PISN subscriber. Several direct dialling plans can be
drawn up for each PBX.
DDO Direct Dialling Out The PBX can forward direct dial numbers to the private leased-line
network via the interface S external.
E.164 – • Numbering plan identifier of the public network as per ITU-T
• Parameter value of parameter
® NPI
– Gateway PINX A PINX is a gateway PINX for the duration of a connection if it
routes that connection from the PISN to the public network or
from the public network to the PISN.
Node Branch point or end point in a communication network
LCR Least Cost Routing Routing function used to determine the network operators via
which a call is to be routed. Usually the most cost-effective route
(least cost) is selected. LCR is also needed for the overflow from the
private to the public network.
– Dialling by name If a name is stored under a call number, the name can be used for
dialling on the terminal instead of the call number.
NoIP Networking over Internet
Protocol
Networking via an existing voice-compatible IP data network
NPI Numbering plan identifier
(Numbering Plan Identifier)
• In the public network, the numbering plan identifier used is
®E.164. In the private area, the numbering plan identifier used
is
® PNP
• Configuration parameter used for specifying the numbering plan
identifier. Parameter values: E.164 / PNP / unknown