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Integrated Services Digital Network
A digital communications network that provides users with multiple services
through a single access point, and integrates voice, data, image, and
messaging across the network.
interexchange carrier
Any carrier authorized to carry customer transmission between local access
and transport areas interstate or intrastate.
inward wide area telecommunications service
A data table that stores information on N00 numbers that are translated
internally within the DMS-250 switch.
INWATS
See inward wide area telecommunications service.
INSV
in service
integrated services access
A service-based architecture that enables calls originating over an ISA PRI
facility to be handled based on the call type. ISA allows any open circuit to
originate or terminate any subscribed service.
ISA
See integrated services access.
ISDN
See Integrated Services Digital Network.
ISDN digital trunk controller
A peripheral module that connects DS30 links from the network with ISDN
digital trunk circuits.
ISDN user part
A Common Channel Signaling 7 (CCS7) message-based signaling protocol
that acts as a transport carrier for the ISDN network services. The ISUP
provides the functionality in a CCS7 network for voice and data services.
ISO
International Standards Organization
ISP
ISDN signaling processor
ISTB
in service trouble
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
List of terms 20-11
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