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62 Glossary — Secondary Domain Name System
Revision 1.02 90023164
Secondary Domain Name System
If the modem cannot connect to the DNS using the primary address, it will try to connect using
the secondary DNS address.
Segment
Each network address consists of four numeric segments, which are divided by a period (".").
Service Provider Identifier (SPI)
This number is a globally recognized identifier that represents your network provider.
Service Provider
An organization that provides connections to the Internet.
The Merlin™ wireless IP Modem works with the Cellular Digital Packet Data (CDPD) network.
To access the Internet using this network, an account with a CDPD service provider must be
set up. For information on availability and rates, contact a service provider in the area.
Service Provider Network Identifier (SPNI)
This number identifies the specific region or domain of the network you currently occupy.
Side Preference
Each CDPD service area is divided into two sides, which are labeled A and B . A single carrier
or service provider is assigned to each side. The Merlin™ modem uses the side preference
setting to determine which of these sides to scan first for usable channels. For example, if
the side preference is set to
A Preferred , the Merlin™ will scan the A side first to find an
appropriate channel. If a channel cannot be found, it will then look on the B side of the service
area.
Note that the side associated with a selected service provider may change with the service
area.
Sleep Mode
The Merlin
™
Wireless IP Modem can be configured to automatically enter sleep mode when
the modem is not actively transmitting or receiving data. In this mode, the modem will
consume very little power, thus extending the host device's battery life.
Terminal Emulator
A program that allows a computer to act like a terminal (a terminal is a device for entering
data into a computer or a communications system and displaying data received).
Wide Area Service Identifier (WASI)
The identification number assigned to a group of service providers who have agreed to supply
coverage over a wide geographic area.
Wireless IP Network
A wireless network (e.g. Cellular Digital Packet Data) that uses Internet Protocol (IP).
Wireless IP Network Sides
Each area of the wireless IP network has an A side and a B side, with a single network
provider assigned to each side. The side a network provider is assigned to may change
between service areas.