User Manual

72 BGAN Terminal User's Guide
LAN ACCESS POINT SETUP
PDP C
ONTEXTS – PRIMARY AND SECONDARY
Resource management for BGAN is based on PDP contexts, or
connections. This means that in congested networks each user
needs his or her own context to ensure a fair allocation of
bandwidth from the network. Therefore, the Satellite IP modem
creates a PDP context for each TE/user. The multiple contexts can
be primary or secondary, but there are benefits to using primary
contexts.
 Primary contexts can connect to different APNs each with an
individual username and password. This is useful because
each APN will only support a single set of subscribed Quality
of Service (QoS) values.
 Primary contexts each get their own global IP address, which
means each TE can be a server/host.
You can configure the modem to enable or disable automatic
context activation. Even if automatic context activation is used, you
can still manually control contexts for flexibility and exception
conditions.
Primary Context
The modem creates a primary context with the entered information.
If a primary context already exists for your local IP address, the
current context is deleted before creating the new one. This could
happen if a context was created automatically and the user wants
to change to a different APN or QoS. Your MMI indicates whether
the context is successfully created or displays any errors.
A disconnect option is also provided to allow you to tear down their
context. This is useful if a streaming context was created, or to free
contexts if other users need to connect. If a user with an
automatically created context disconnects from the MMI, his or her
context is deleted. When the MMI application is shut down, all
contexts are deleted.