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Context. When incoming data arrives at an access point in the core network, a packet
classifier will make a PDP Context selection based on the Traffic Flow Template, and map the
incoming data packets into the PDP Context with the correct QoS attributes. The use of a
Traffic Flow Template allows multiple PDP Contexts to be associated with the same PDP
address.
USIM Card: Your Service Provider supplies you with a Subscriber Identification Module (SIM) Card
or a Universal Mobile Telecommunications System Subscriber SIM (USIM) Card.
A SIM or USIM Card is a card commonly used in a GSM phone. The card holds a microchip
that stores information and encrypts voice and data transmissions, making it extremely
difficult to listen in on calls. The USIM Card also stores data that identifies the caller to the
Service Provider.
UT: User Terminal; BGAN Satellite Terminal.
Virtual Private Network: A Virtual Private Network (VPN) enables remote offices or users to gain
secure access to their organization's network over the public telecommunications network.
This provides the benefits of remote access without the expense of dedicated leased or
owned lines. VPNs work by using tunneling protocols, such as L2TP, to encrypt data at the
sending end, and decrypt the data at the receiving end. This "tunnel" cannot be accessed
by data that is not properly encrypted.
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