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PacketBand ISDN Overview and Summary |
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The PacketBand-ISDN range delivers completely clear/transparent ISDN channels across different types of packet networks.
PacketBand turns your packet network into a virtual ISDN network.
The following is a brief oveview of PacketBand's capabilities followed by some simple Application examples.
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Calls can be made between any port on any PacketBand |
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In effect turning a packet network into an virtual
ISDN network |
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Each channel on a PRI, for example, could dial a
different location, clear down and dial another |
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Calls between PRI and BRI ports |
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Calls are established only as-and-when needed |
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No use of network capacity unless for real traffic |
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All ports available for calls |
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Call signaling passed end-to-end and “rebuilt” |
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Even between PRIs and BRIs |
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Even if each “B” channel on a BRI goes to
different destination |
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Support for most Supplementary Signaling |
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Support for User-to-User signaling (UUS-3) in the
“D” channel |
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Each PacketBand can have simultaneous calls to
different locations |
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Complete flexibility |
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Example Configurations |
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The following provides a few basic examples of how PacketBand-
ISDN can be used and is designed to give an overview of its
capabilities and possibilities.
At its simplest, PacketBand-ISDN can be used to connect two endpoints
together across a wide area packet network. Click the image for a larger diagram.
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Diagram 1. Shows site A with a PRI and site B with multiple BRIs. The
diagram happens to show video conference units as well as voice,
but any devices can be used/transported.
[Note, if you just wish to extend ISDN across a LAN then our
LanBand may be more appropriate.] |
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Diagram 2. Adding a third site C means calls can be placed between the three
locations, cleared down and then different calls established as
required. Any channel can, if so configured, call any other. |
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Diagram 3. Adding access to the PSTN, as shown in Diagram 3, provides users
on the packet network with dial-out capabilities, and/or the ability to
be called from the network (subject to correct permissions).
Having PSTN access means any user on the network can call, or be
called, by anyone else in the world, just as if they were connected
directly to a carrier ISDN service.
Diagram 4 adds a further PacketBand site, this one shown as a
larger chassis-based system supporting many PRIs.
As this site also has access to the PSTN it gives users a second route
for off-network calls. |
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Diagram 4. If, for example, site C is in the UK and site D in the USA, any calls
recognised as being “off-network” and with a leading “001” will be
routed across the packet network and out onto the USA gateway as
a local ISDN call. In this way the video conference unit in the UK site
C can place a call to the video unit on the PSTN in the USA with the
obvious cost savings.
An interesting alternative is using the PacketBand’s flexible number
translation and routing so an in-coming call from the USA PSTN based
video conference unit could dial a local USA number which the
PacketBand then routes to the UK video conference system at site C. There really are a lot of options and you will find the PacketBand-
ISDN to be extremely flexible! |
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Diagram 5 simply shows an alternate way of interfacing to the PSTN
via the PABX at site A. PacketBand can connect directly to the PSTN
or work through a switch which then directs traffic to local devices or
to the PSTN. |
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Diagram 6. The SIP Server on the left of the drawing gives a centralised repository
for IP and ISDN numbers. More than one SIP Server can be used,
with loads shared and for resilience. |
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Diagram 7. Some applications require all calls to be routed back through a
central switching centre with perhaps inter-connects to other carriers
and the PSTN. |
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PacketBand is an ideal way to deliver standard ISDN services to
customers without having to worry about what applications they
connect; PacketBand will transport any traffic, retaining clock integrity
and delivering a completely transparent service. Bandwidth is also
only used when needed and the central PRI ports can be
shared/contended for.
For more information see the Product Data Sheets or contact Patapsco
to discuss your ideas and applications. |
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