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ISDN
The Satellite Terminal provides an ISDN (Integrated Services Digital Network) interface to connect
devices for Circuit Switched voice and data services. It is a Basic Rate (also known as 2B+D) interface
and uses the Euro ISDN protocol. Note that the Satellite Terminal can only provide service for one
64Kbps B-channel at a time.
D D D D
N N N N
IALING AND
IALING AND
IALING AND
IALING AND
UMBERING
UMBERING
UMBERING
UMBERING
D
IALING
As the ISDN numbering system follows the same pattern as the normal telephone system, dialing is
carried out in exactly the same manner as making a normal telephone call. The subscriber number is
used with the same international and area codes as any other telephone network.
M
-S
N
ULTI
UBSCRIBER
UMBERING
ISDN supports Multi-Subscriber Numbering (MSN). MSN is a facility whereby more than one telephone
number can be allocated to an ISDN line. The BGAN Satellite Terminal assigns different MSNs for Voice,
3.1KHz Audio, UDI and RDI devices. Each incoming call will be directed to the appropriate MSN
depending on the type of call. This allows proper routing of incoming calls to the correct ISDN device (e.g.
ISDN phone, data card or Fax).
PDP C
ONTEXT
A Packet Data Protocol (PDP) Context defines connection aspects such as routing, Quality of Service
(QoS), security and billing between a mobile user terminal, such as the BGAN Terminal, and a data
network. PDP Contexts are essential to the General Packet Radio Service (GPRS) system, which is used
by GSM and UMTS-based 3G networks worldwide for transmitting data.
In order for a user to be able to transfer data across a network, a PDP Context must be activated in the
Terminal and associated Core Network. The procedure for this is as follows:
1. After registration with the network, the user activates a PDP Context using an application on the
computer or Terminal, and requests sufficient radio resources (that is, power and bandwidth) to
support the context activation procedure.
2. Once the resources are allocated, the Terminal sends the Activate PDP Context request to the Core
Network. This request includes key information about the mobile user's PDP address (for example an
IP address), PDP type (that is, static or dynamic address) the QoS requested for this context, the
APN of the external network to which connectivity is requested, the user's identity (IMSI) and any
necessary IP configuration parameters (for example, security settings).
Glocom GX-9 (FB250 Class) Operating Manual
(MSN)
35
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