Specifications

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TNPP Limitations and Specifications
between two systems are examples of conditions that duplex mode can detect. Packet
modem radio can offer cost savings over dedicated lines, but works best with low to
moderate traffic volumes. Also, note that systems that send many pages with large display
messages over the network may wish to increase the packet modem's packet size, in order
to increase throughput.
For further details on TNPP itself, such as a current copy of the protocol standards, look
on the web page of the Paging Technical Committee. The URL for this site is currently:
www.pagingcarriers.org/ptc.htm
TNPP Limitations and Specifications
Limitations of TNPP
Tone-only, numeric, and alphanumeric display paging can be done; however, voice
paging is not supported. This is a limitation of TNPP itself, not our system. You may
configure the 2000 Series so that a call to a voice pager will have the voice message
transmitted at the terminal of origin, and cause an alert page sent over the network.
Combining this with the Insurance mode of PageSaver allows a subscriber with a voice
pager to take advantage of wide area network paging.
Our Current TNPP Limitations
You must have a continuous link between the systems. There is no provision for any kind
of dial-up line at this time.
TNPP provides for either capcode paging, or subscriber ID paging. Capcode paging is
supported by most systems; subscriber paging is not as widely supported. Zetron supports
both capcode and ID paging.
Limitations of Multi-node TNPP
There are three classes of node addresses as recognized by Zetron's Multi-node TNPP.
The first class is the primary node address of the terminal. As this address should be
unique within the network any page that has a destination address matching that of the
terminal's primary address is accepted and routed into the paging terminal. Such packets
are never routed on to other terminals.
The second type of node address is the distinct secondary address, where each address is
explicitly programmed into the terminal. Currently up to 32 incoming addresses may be
specified. These addresses may be programmed as pass through addresses that route
packets on to other nodes, or as secondary node IDs that cause pages to be transmitted by
the terminal. Any mixture of address types may be selected.