Terminal Addressing And Service Profile Assignment - Nortel Meridian 1 Administration And Maintenance

Chapter 5 — ISDN BRI line and packet data implementation

Terminal addressing and service profile assignment

ISDN BRI terminal addressing and Terminal Service Profile (TSP)
assignment differs from the conventional approach where a Terminal
Number (TN) identifies a terminal and its address and the protected line
blocks in the database contain service related data for that terminal.
Terminal Service Profiles (TSPs) are service profile specifications stored in
the database that can be associated with various terminals during terminal
initialization and that define the terminal DN, class of service, call restriction
levels, and other service and feature attributes. ISDN terminal initialization
occurs when a terminal is installed, every time the system is initialized, or
when the MISP or the line card the terminal is connected to is replaced.
ISDN BRI terminal addressing
An ISDN BRI terminal connected to a DSL is addressed by using both the
physical address and the logical address, where:
— the physical address is c, dsl#, representing the physical (layer 1)
identifier
— the logical address is defined as Terminal Endpoint Identifier (TEI),
which is a data link (layer 2) identifier and the Terminal Service Profile
(TSP), which is a network (layer 3) identifier
The Terminal Service Profile (TSP) is represented by the combination of the
User Service Identifier (USID) and the Terminal Identifier (TID). The USID
uniquely identifies the TSP assigned to one or more terminals on a DSL. Up
to 16 TSPs can be configured per DSL.
USID is entered in overlay 27, and is entered on the terminal keypad during
initialization.
The SPID is an identification number (any combination of 1-20 alphanumeric
characters) that is configured in the TSP in overlay 27 and is usually the DN
with one or two numeric or alphanumeric (depending on the type of terminal)
characters appended to it.
The TID identifies a specific terminal on a DSL using that TSP. All the
terminals on a DSL that share the same TSP will have the same USID and a
unique TID. TID is an internally assigned parameter that is transparent to the
user.
Option 11C ISDN BRI Administration and Maintenance
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