Specifications

Introduction
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TNPP Networking
Introduction
The TNPP (Telocator Network Paging Protocol) option provides a standard method of
communicating between paging systems. On the Series 2000 Paging Terminals, it is
implemented using the Multiport card running TNPP software.
TNPP is used to link paging terminals together so paging can cover a wider area. It has
been used as a concentrator for display pages, where a terminal with a set of local phone
lines takes calls and uses TNPP to forward the pages to a remote terminal, thereby
avoiding the expense of many FX lines.
To use TNPP to the best advantage some thought must be given to the management of the
network you will be part of. Depending on the needs of your particular application, proper
network design can increase paging throughput and reduce customer database
maintenance.
Overview of TNPP
TNPP passes packets of information between systems. These packets are binary data sent
over a serial link. Each system that sends or receives TNPP packets is a node. A TNPP
network is formed when two or more nodes are connected to each other. Nodes are
connected by links, a link being the means that data is transferred between the terminals.
These packets may contain capcode pages, subscriber ID pages, and various types of
network related information. Capcode pages include a description of the target pager such
as GSC type II-A pager, channel and zone information, and message class such as beep-
only, numeric, or alpha. ID pages send a subscriber ID code, depending on the receiving
terminal to obtain the pager description for its local database. Both capcode pages and ID
pages may include a display message, and both carry a function code and flag to indicate
low or high priority.