PAGE 2
• In-Coming Call Routing – ISDN traffi c can be routed based on DDI (MSN), CLI,
Sub-address, type of call (voice, fax, video etc.), the port or channel number of
an ISDN call or a combination of these fi elds. Calls can be routed to a specifi c
ISDN port, group of ISDN ports, an individual “B” channel, timeslot or into the
Packet Network.
• Out-Going Call Routing – ISDN calls are routed to a remote PacketBand over
the IP network either by user-confi gured rules or by using Patapsco’s SIP Server.
• SIP Server – An optional SIP Server can help with network confi guration and
routing parameter maintenance in larger systems where attached devices may
need to call any or many other locations as opposed to routing to a few central
sites. The SIP Server gives a central repository for all ISDN and IP routing tables,
simplifying the requirements in individual PacketBands. Multiple SIP Servers can
be confi gured for systems requiring exceptional resilience.
Calls can be converted to the correct PacketBand (identifi ed by IP address) based
on internal tables which use all or part of the number dialled. If the number is not
recognised the call can be routed to a “Gateway” PacketBand with access to the
national/international ISDN.
• Call Conversion – This feature enables PacketBand to add, edit or remove the
digits in any part of a call before it is forwarded on. An example application might
be where emergency numbers may need to be routed to a specifi c regional
offi ce and PacketBand can convert, for example, “112” into the correct regional
telephone number for that location. Another example would be where the dialled
number needs to be forwarded to a “hidden” destination number.
PacketBand is also able to delete/add/modify CLIs, down to an individual “B”
channel, and this can be useful for billing purposes.
• Call Barring – Block calls from certain CLI and/or calls with a certain DDI.
• Alternate Routes – PacketBand supports Primary, Secondary and Tertiary
routes. Should the primary destination be unavailable, the call will be routed to
the Secondary etc.
• PRI Port Options – Select NT or TE ports, choose E1 or T1, add tone
generation, and inhibit particular information elements on a per-port basis.
There are advanced options to allow connection to a wide range of ISDN devices
supporting specifi c operating protocol. Two pairs of ports are connected by
relays which will close on power failure, connecting the two ports, for resilience
purposes, via a metallic path.
Transition Networks, Inc.
Worldwide Headquarters:
10900 Red Circle Drive
Minnetonka, MN 55343 USA
tel: 952.941.7600 / 800.526.9267
fax: 952.941.2322
info@transition.com
http://www.transition.com
©2011 Transition Networks, Inc.
All trade marks are the property of their respective owners.
Technical information is subject to change without notice.
Overview
The PacketBand-ISDN range transports ISDN traffi c across packet networks. For
some types of device it is the only reliable and error free solution.
ISDN networks from carriers deliver clocked transparent 64k channels which
can be used by any type of traffi c anywhere in the world; PacketBand
does the same.
ISDN “B” channels are set up dynamically across the packet network giving
inter-connectivity between any device, and which can, importantly, “break-
out” into the global ISDN PSTN and access any other device world-wide. All
PacketBands are locked and synchronized to the network clock via an advanced
clock-recovery system ensuring reliable slip-free services for all applications.
This means not only can high-quality voice be transported over low-cost packet
networks using existing PBXs, but so can synchronous applications such as
videoconference units, voice codecs, encryptors, fax machines etc.
Not only does PacketBand deliver high-quality clock-locked transparent
channels as and when needed and where needed, it also has great fl exibility in
terms of adding CLIs for billing, converting numbers for emergency routing and
alternate routing and resilience options.
If you are a carrier looking to deliver reliable ISDN to customers, a military,
governmental or broadcast organization needing to transport synchronous ISDN,
or perhaps in another vertical or a corporate with some specifi c ISDN/IP issues,
PacketBand may be able to assist.
This document focuses on the PRI versions of PacketBand.
ISDN Routing and Features
• Type of User Traffi c – Any. PacketBand passes all “B” traffi c transparently in
a clock-locked or synchronous environment. All PacketBands in the network are
synchronized to a common clock.
• – Any “B” channel on any ISDN port can connectConnectivity
to any other.
• “Break-Out” – PacketBand can be connected to the real ISDN network as a
“gateway”, giving devices connected via the Packet Network access to/from all
other ISDN devices in the world.
• Logical Links – Each PacketBand-ISDN can be purchased supporting
different numbers of Logical Links. Each Logical Link is a connection of up to 32
“B” channels between any two PacketBands. For example, if there was one “B”
channel established between two PacketBands that would be one Logical Link.
If a second call is established, from either direction between the same two units,
this call would be incorporated into the same Link to reduce overheads. Logical
Links are only assigned when in use so once a connection has been cleared, the
Link is available for use to any other PacketBand.
PABX
BRI Ports
SIP
Server
