Sierra Wireless 555 User Manual

Page of 70
Installation Guide
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2130163
Note: You can use the Lock 
Code feature to prevent others 
from using your account should 
your AirCard be stolen. For infor-
mation on this feature, see the 
.
Each service provider has its own pricing options. There may 
be flat rate accounts, which provide you a maximum number 
of minutes of network usage for a fixed monthly fee. There 
may be accounts for which you are charged for network usage 
by the minute or by the amount of data transmitted.
Your account may include a variety of other services such as 
SMS messaging and voice mail.
Each AirCard has been provisioned at the factory for use with 
a particular service provider. This sets the AirCard to use 
particular radio channels and enables services specific for that 
provider.
The process of setting up your account is called activation
Activation involves action by the service provider and configu-
ration of the AirCard.
The procedure to configure (activate) your AirCard is covered 
in 
The CDMA wireless network
Note: More information about 
 networks is available on 
the CDMA Development Group 
web site, 
This is the worldwide infrastructure providing the radio 
coverage that allows you to stay connected. Made up of radio 
towers, and a variety of network switches, routers, and servers, 
the network is an interconnection of many service provider 
companies.
Note: Most service providers 
have coverage maps on their 
web sites. 
There are 
 networks that operate in the frequency bands 
supported by the AirCard throughout North America and 
parts of Latin America, Asia, New Zealand, and Australia. 
However, each service provider operates a network that covers 
a limited geographical area within the overall CDMA coverage 
area.
Note: The fee for service is 
usually higher when you are 
roaming (connecting to a 
network other than the one 
belonging to your service 
provider). The Call Guard feature 
(subject to feature availability) 
can warn you before making or 
answering calls while roaming.
Most service providers have “
service providers, so that they can offer service outside of the 
coverage area of their own networks. For example, assuming 
you live in Vancouver and travel frequently to Seattle, you can 
obtain an account with a Vancouver service provider that has a 
roaming agreement with a service provider in Seattle. You 
would then have local service in Vancouver, and roaming 
service in Seattle. (Most service providers charge more for 
roaming service than local service.)