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Features |
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Modular, resilient PRI ISDN switch, ISDN
splitter, sharer or concentrator |
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Non-blocking |
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Full cross-connection between any/all ‘B’ channels |
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A-Law to µ-Law voice conversion |
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Connects to ISDN networks and/or local
ISDN devices |
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Advanced routing capabilities |
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Number manipulation |
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Shares ISDN access between multiple local
devices |
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High call rate |
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Switch between devices for load-sharing
or resiliency |
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Least Cost Routing |
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Dynamic re-directing of calls if
destinations unavailable |
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Local connectivity between any ports |
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Ports NT/TE user switchable |
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Optional PRI E1 to T1 conversion |
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Supports A-Law to μ-Law for voice
conversion |
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Tones generated from network and/or by
Liberator “E” |
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Clocking hierarchy |
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Inter-link Liberator “E”s for a larger cross connect
switch |
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Remotely manageable and software
upgradeable |
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Many applications and uses |
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Overview |
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The Liberator models detailed within this document support up to 32
E1/T1/PRI interfaces via two card types, either 8-port or 16-port cards.
The PRI ports on the 8-port card can be user-switched between NT and
TE and have Telecoms Approvals for direct connection to the ISDN
network.
The PRI ports on the 16-port cards are NT only.
When mixing an 8-port and a 16-port card the 8-port is always in the
lower position. See the Ordering Information PDF for details.
As standard Liberator ‘E’ can be user configured with either all E1 or all
T1 PRI interfaces. Purchasing the optional E1 T1 conversion pack means
both E1 and T1 can be supported on the same unit and this can be
selected on a per-port basis.
The unit will connect any port to any port and any ‘B’ channel to any ‘B’ channel without constraint, giving full cross-connectivity between all ports,
both local and network channels.
The intuitive DbLite GUI (supplied) enables fast and simple configuration.
All options can be set to tailor the use, connectivity, least cost routing
and other advanced features to match the requirements. The platform
supports many applications, some of which are covered in
Application Notes available on our web site www.patapsco.com
If your requirement is not specifically identified here, or in the Application
Notes, please contact Technical Support or Sales at Patapsco.
The flexibility and modularity of the Liberator means it can be put to
many varied uses.
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Operation |
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ISDN Services |
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Signaling is carried/converted between ports and ISDN types including
when converting between ETSI and ANSI standards.
Supplementary Services from the network are passed transparently to
local devices.
Enbloc and Overlap dialling are supported and Liberator can convert
between the two. |
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Screen shot from DbManager
showing the Liberator E to which
the manager is connected.
Optional Ethernet card fitted and
shows LED status. |
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Screen shot from DbManager showing the Liberator "E" to which the manager is connected. Optional Ethernet card fitted and shows LED status. |
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Routing |
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Liberator supports many routing options including the ability to
configure Primary, Secondary and Tertiary destinations.
Call routing can be based on the incoming port and /or channel,
DDI (DID) number, CLI, sub-address and/or Call Type (Bearer
Capability).
CLIs can be locally generated.
Number Translation (see below) is standard on the Liberator “E” which means leading, trailing or digits in the middle of dialled
number or CLIs can be modified, giving a great deal of flexibility.
It is extremely rare that Liberator cannot be configured to meet a
customer requirement. |
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Configuration/Management |
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Liberator is configured and managed by Patapsco’s DbManager -
see separate Tech Sheets.
DbManager is an intuitive GUI which supports multiple real-time
workstations and is the common platform for all Patapsco products.
Versions are available which can be configured for a single
Liberator “E” or simultaneously manage/monitor many.
Configuration/management sessions can be established remotely
via an ISDN call or locally through the unit’s serial port or optional
Ethernet port.
SNMP Traps & Alarms are optionally supported as is a call/ISDN
signaling protocol analysis tool. |
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Ports and Inter-Connectivity |
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Ports, Channels and Groups |
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Liberator employs a simple system where PRIs or individual ‘B’ channels within one or more PRIs can be allocated to one or more
customer named “Groups”.
These Groups form the basis of all configurations, making it fast,
simple and intuitive to your applications. |
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Example of a Routing Profile |
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Cross-Connection |
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Any ‘B’ channel can be connected to any other within Liberator
without constraints (unless some are programmed).
Any port can be barred from calling any other port or number.
Any call can be routed to a Group of ports or ‘hunt-group’.
Multiple devices can be configured to accept calls dialling to a
range of numbers and the calls can be routed to a Group in a
variety of ways (sequential, always the lowest available port etc).
Incoming calls can be automatically rerouted to alternate preprogrammed
destinations if the main number is busy or
unavailable, or after a set time of not being answered (1-20
seconds). |
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Call Rate |
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Liberator can maintain a constant call rate (in-coming or out-going)
of 10 calls/sec with peaks of up to 20 calls/sec |
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Redirection on ‘Busy’ or ‘Unavailable’ |
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Incoming calls can be automatically rerouted to alternate preprogrammed
numbers, Groups or ports if the main number or port
is unavailable.
This gives the ability to automatically switch to backup or standby
devices for resilience purposes.
Liberator supports alternative Secondary and Tertiary destination
Routing Profiles.
If an out-going call to the ISDN network cannot be established
(user or network busy, for example), Liberator can automatically
redial via other network ports without the end user having to take
any action. The same can be done for incoming calls switching
between local devices. |
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E1 to T1 Conversion |
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Liberator can optionally convert between E1 and T1 PRIs.
Liberator supports the necessary A-Lau to μ-Law encoding
conversion necessary for voice traffic. |
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Number Translation or Conversion |
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Any incoming dialled number can be converted by Liberator and
presented on any ISDN interface.
For example an incoming call to 12345 may be converted to
98765, perhaps because the original extension at 12345 has
moved onto a VoIP gateway on a different ISDN PRI and now the
user has a different DDI number.
Liberator can convert/add/delete leading digits, digits in the
middle of numbers and/or trailing digits. It can also manipulate
sub-addresses and CLIs.
All of this flexibility is not required by all, but if you should need it,
it is easy to use and configure. |
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Tone Generation |
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Liberator normally passes the tones transparently between ISDN
points but this is not always possible in all instances, such as some
least-cost routing applications, if there is no network at all, or in
certain other circumstances such as when Liberator cannot make a
final routing decision until the number is dialled. In these instances,
Liberator can be configured to generate dial, ring, busy, N/U tones
itself. |
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CLI Generation |
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Liberator is able to generate a CLI field. The number of the CLI can
be programmed for individual ports or calling numbers. |
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General |
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Clocking |
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Software-selectable clock source,
extracting clock from any PRI port or
a very high quality 0.15ppm Internal
Clock.
Auto-switchover between clocks with
no user impact. Auto recovery to
higher priority clocks when they
become available. |
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Real-Time Clock |
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Internal battery-backed real-time clock
for Event Log time-stamps and
debugging purposes. |
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Events |
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Up to 5000 Events are held within
the Liberator in NV RAM on a FIFO basis. Events include all call
information such as port dialling, number dialled, sub-address, time
of call and time of call clear-down, time of incoming call and to
which port and if there is a CLI attached, time of clear-down and
which ‘end’ cleared.
Events can be reported automatically to the DbManager or other
tools via an ISDN call, the local serial port or via the optional
Ethernet.
This can be on a timed schedule or when the Event Log reaches
90%. Once Events are successfully reported to the DbManager the
log is cleared. DbManager can also access the logs and download
them when required.
DbManager writes all Events and Alarms to a flat .csv file in real-time
and this file can be manipulated by external tools to format and
extract information, for example for billing. |
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Routing and Prioritisation Summary Windows |
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A choice of easy to understand summary windows display the
routing configurations. These include a complete display of all routing
profiles, their order of priority, names, numbers, ports etc. These
windows are particularly useful in more complicated configurations
with multiple network ISDNs, multiple local ports/devices and
perhaps re-direction facilities. |
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Diagnostics |
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Liberator provides excellent diagnostic and debug tools with visibility
of all routing decisions taken across the unit and all messages from
attached devices.
Patapsco have a conversion program available that can convert raw
ISDN Layer 2 and 3 messages into more comprehendible English. |
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DbManager showing a summary of all Call Routing Profiles. |
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Approvals |
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The Liberator “E” benefits from a wide range of Safety and Emissions
approvals and the 8-port card also has Telecoms Approvals for
direct connection to the ISDN PSTN. Section 5.7.
All Patapsco equipment is RoHS compliant without having to resort to
the use of temporary “Exemptions”. |
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Configuration |
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Held in non-volatile RAM (retained during power off) and
downloadable to/from the DbManager. Configuration files can be
saved to a file on a PC. |
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Software |
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New versions of software can be remotely uploaded to Liberator via
the DbManager. This is loaded to an off-line sector of FLASH and a
confirmation check-sum given. The operator can switch software
banks at any time and revert to the original software at any time. If
the Liberator is unable to run from the new software, it will revert to
the original. |
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Specification |
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Interfaces |
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PRI/E1/T1
16-port NT-only card and 8-port selectable NT/TE.
16-port cards marked as Ports 1 to 16 and Ports 17 to 32.
8-port cards marked as ports 1 to 8 and 17 to 24.
When mixing 8 and 16 port cards ports 9-16 will not exist.
By default all ports are NT – a crossed cable is required to
connect TE ports on the 8-port card
E1
RJ45 120Ohm balanced (E1)
Auto-detect CRC4 or non- CRC4 framing (Multiframe or
Doubleframe)
Support of non-switched E1 and Fractional E1 services
ISDN PRI ETSI Q.931/921, ETSI-DSS1, ETSI 300-011,
ETSI300-125, ETSI 300-102, approved to TBR4
A-Law and μ-Law tones
T1
RJ45 100Ohm balanced T1
ESF or D4 Framing selectable
B8ZS or AMI Line code selectable
NI-2, DMS-100, AT&T 5ESS Switch selectable
AT&T TR-62411 and ANSI T1.403 Compliant
Hong Kong variant available
A-Law and μ-Law tones
Control ports
RJ11 Marked ‘Cmd’
Asynchronous 8 data, 1 stop bit no parity 19.2kbps to 115kbps
Password protected
Dry contact alarm relay
Optional Ethernet RJ45 Marked 10baseT/100baseT/1GE
Password protected |
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LEDS |
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Each PRI has 1 associated LEDs
Fl slowly=synchronising to Layer 1; fl quickly = synchronising
Layer 2; solid= synchronised
PWR x 1
Unlit=no power; Green=power on unit
Run x 1
Slow flash=microprocessor OK and configured; fast
flash=internal error or lost base configuration
LAN ACT x 1
Activity on the LAN
LAN 100 x 1
Off=LAN running at 10baseT; on=LAN running at 100baseT |
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Power |
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Support for 1 or 2 supplies
Hot swapable to ATCA.
One supply can power a fully populated chassis.
AC
Auto-sensing 96VAC – 240VAC
Max consumption 0.5A RMS @230VAC
DC
4mm terminal Block
36VDC tp 57VDC
1.2A max |
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Environment |
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Operating 0 – 55 °C
Humidity 10-90% non-condensing
Natural convection cooling |
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Physical |
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Metal chassis and front/rear panels
W – 225; D – 320 (300 from mounting); H-88mm
Weight – 10.5Kg max
Operating temperature -20°C to +55°C radiated cooling
Humidity 10-90% non-condensing
Optional cooling fans for higher temperature environments |
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Maintenance |
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There are no serviceable parts or maintenance required.
The battery used for the real-time clock and some NV RAM
elements has a 7 year (typical) life-time. |
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Approvals |
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All approvals completed in UK
Accredited laboratory - reports available
Telecomms
TBR12/TBR13
TBR4:1995, 1997 Amendment
TIA/E1A-IS/968
TNA117
AS-ACIF-S006/S016
CS-03 Canada
TIA-968-A USA
EMC
EN55022:1998
EN55024:1998
A12001
EN61000-3-2/3:1995
AS/NZS CISPR22:2000
Safety
IEC60950-1:2007
ACS/NZS60950:2000
AS/NZS3260:1993
ACA TS001:1997 |
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