ZETRON 640 DAPT XTRA, Installation And Repair Manual, Page: 161 / 210

Glossary
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Term Definition
Multitone
A digital pager format that supports tone, voice, and numeric pages.
Although somewhat obscure, Multitone pagers are popular for health
care applications where combined voice and display messages (such
as a patient room number) are desired.
NAK
A TNPP packet response that a page was not properly received by the
destination node. A No AcKnowledge response can indicate too much
RF link noise or invalid packet data (capcode, pager format, etc.)
NEC D3
A medium-speed digital pager format that supports tone and numeric
display pages. The format is very similar to 2-tone in functionality.
Network
A set of communications lines or devices that are connected together
to provide greater coverage area and availability. See also
TNPP and
TAP Protocol .
Nextout
An emergency priority that allows a page to move immediately to the
front of the queue. Nextout pages take priority over all other pages,
except breakthrough.
Node
A single TNPP address. Each node is identified by a unique four-digit
number. The node usually indicates the paging system where a page
originates or is destined.
Noise
Any interference in a communications link. In the paging world, noise
can cause missed or garbled pages, false alerts, and inaccurate data.
Numeric Display
Paging
A display paging format that combines numeric characters to form a
phone number message. Numeric pages can include spaces and
hyphens, depending on pager type and terminal software.
Nurse Call System
A display page (usually alphanumeric) input device used in hospital
applications. Most nurse call systems allow an operator to manually
enter pages to an in-house paging terminal for immediate alert of
medical situations. The nurse call input device usually interfaces with
the Model 640 by way of a local serial connection for reliability and
fast system response.
Outdial TAP
A common means of sending a small to medium volume of alpha-
numeric pages to another paging terminal, usually through a dial-up
connection. Outdial TAP pages can only be sent to the node address
for which the page is intended - the page cannot be passed through a
series of networked terminals. Outdial TAP is limited by its inability
to support capcode paging, or send function codes and priority pages.
Overdial
Touch-tone signals sent to the hardware from a modem or telephone
keypad. Overdial often indicates that tones are dialed before the
prompt is through playing.