Sbb Circuit-Switched Services; Primary And Secondary Pdp Contexts; Equipment Specifications - EMS eNfusion 1252-A-4100-01 System Description, Installation And Maintenance Manual

SYSTEM DESCRIPTION, INSTALLATION, AND MAINTENANCE MANUAL
eNfusion™ HSD-X and HSD-Xi High-speed Data Terminal
(b) Standard IP
Standard IP services, also known as Background IP services, can transfer data
at a rate of up to 432 Kbps. Typical throughput rates range between 100 to 300
kbps. This bandwidth is shared by all users on a channel, and users may
experience lower transfer rates when multiple users are transferring data.
Standard IP is the recommended service for using the Internet, e-mail, and VPN
applications that have moments of high traffic followed by low or no traffic. The
cost of standard IP services is based on the amount of data transferred.

(2) SBB Circuit-Switched Services

SBB supports one 64 Kbps ISDN bearer to provide the following services:
• AMBE+2 voice
• 56 kbps RDI
• 64 kbps UDI
• 3.1 KHz audio
The cost of circuit-switched services is based on the amount of time the connection
is active.

(3) Primary and Secondary PDP Contexts

A PDP context defines connection aspects such as routing, QoS, security, and billing
between the HSD-Xi terminal and a core network.
SBB requires a primary PDP context to establish IP services. Therefore, it is activated
first. A primary PDP context is associated with a unique IP address.
A secondary PDP context can only be established after a primary PDP context has
been activated. Secondary PDP contexts can be used when some applications
require different QoS profiles. For example, a primary Background PDP context can
provide Internet access and e-mail, and a secondary streaming 128 kbps PDP context
can provide video conferencing.
A secondary PDP context has the same IP address as the primary context, but it can
have different QoS profiles.
3.

Equipment Specifications

The HSD-Xi is a 2-MCU size terminal with mounting requirements that meet the ARINC
600 specification. The front panel has one, female, micro-D type connector for data loading
and monitoring of the unit.
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