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Features |
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Supports 2 or 4 interfaces |
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Each pair converts between E1 PRI
ISDN and 1 PRI ISDN |
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Available in NT-only and NT/TE
variations (with Telecoms Approvals) |
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Support for Fractional PRIs |
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A-Law to µ-Law voice conversion |
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Support for Fractional PRIs |
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Any timeslot to any timeslot cross connectivity |
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Controllable via Ethernet port or
serial port |
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AC or DC PSU options |
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Clocking hierarchy |
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Local Call Progress Tone generation |
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Overlap and en-block dialling
supported |
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Optional sophisticated number
manipulation/conversion/LCR |
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ISDN Layer 2 and Layer 3 message
capture and log for analysis |
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Easy and intuitive to configure via |
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GUI management package and
optionally centralised control of many
Liberators |
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Very attractive pricing |
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Approved (Telecoms, Emissions,
Safety) |
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RoHS compliant for Europe |
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Overview |
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Liberator “C” is a T1 to E1 PRI (Primary Rate) ISDN converter with advanced routing
and conversion options.
Using flexible Routing Profiles, individual “B” channels or timeslots can be switched
to any PRI within the unit or simply passed between the E1 and T1 on
corresponding timeslots.
Calls can be accepted/rejected and routed based on DDI/DID (dialled number),
CLI, sub-address, call type (voice, data etc), originating port – or any combination.
Liberator “C” optionally provides a great deal of flexibility for number manipulation.
The product is available in 4 basic configurations:
- With a single pair of 1/T1 ports
- With two pairs of ports
- Each of the above with NT only presentations where the Liberator
connects to two pieces of customer equipment and their TE ports
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Or with User-switchable
NT/TE
ports where the
Liberator can also
connect TE interfaces
directly to a network
(Telecoms Approvals
are required) |
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DbManager is a high-quality intuitive GUI that connects to and manages/monitors
Liberator “C”. Several versions are available in addition to the free DbLite supplied.
All Patapsco products are designed and manufactured to the highest standards and
all have the necessary Safety, Emissions and Telecoms approvals. |
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Operation |
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ISDN Services |
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Signaling is carried/converted between ports.
Supplementary Services from the network are passed.
Sub-addressing handling and routing is supported, as is the ability
to route on Bearer Capability (call type).
CLIs can be locally generated.
Data is passed transparently. |
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Configuration/Management |
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Liberator “C” is configured and managed by Patapsco’s
DbManager. See separate Tech Sheets and movie.
DbManager is a real-time GUI which can optionally support and
provide centralised control, Alarm/Event gathering and diagnostics
for many Liberators. Versions with multiple management stations is
also available.
Configuration/management sessions can be established remotely
via an ISDN call, through its local Ethernet/LAN ports or through
its serial RJ12 port. SNMP Traps & Alarms are optionally supported
and a call analysis tool is available.
DbLite is supplied FoC with each unit. See DB Manager
Comparison Chart |
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Number Manipulation |
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Liberator “C” has a very flexible option to convert and manipulate
many numbers and in many fields. It can add/delete/convert
digits at the start, middle or end of numbers; it can generate and
manipulate CLIs; it can change the numbers if it has to route to
Secondary or Tertiary destinations or channels. If your application
needs or can benefit from any form of number management,
Liberator “C” can probably achieve your required result. |
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A-Law and μ-Law Voice Encoding |
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The voice channels are encoded differently on T1 and E1
interfaces. Liberator “C” performs the necessary conversion. |
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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. Where tones
are not available Liberator can be configured to generate dial,
ring, busy, N/U. |
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Clocking |
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Software-selectable clock source using any interface or Internal
Clock.
Auto-switchover to secondary/tertiary clocks on clock loss.
Internal clock accurate to +/- 10ppm. |
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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, subaddress, 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 Console port or across the LAN.
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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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 available a conversion program that can convert
raw ISDN Layer 2 and 3 messages into more comprehendible
English. |
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Approvals |
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The Liberator “C” benefits from a wide range of approvals for
connection to ISDN services. See specifications below. All
Patapsco equipment is RoHS compliant. |
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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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E1 |
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RJ45 120Ohm balanced (E1)
G.704 HDB3 encoded
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 |
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E1 |
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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 |
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Control Ports |
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RJ11 Marked ‘Cmd’
Asynchronous 8 data, 1 stop bit no parity 19.2kbps to
115kbps
Password protected
Dry contact alarm relay
Ethernet RJ45 Marked ‘LAN’ 10baseT or 100baseT
Password protected |
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LEDs |
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PRI x 4
Each PRI has 2 associated LEDs
Upper LED - fl=synchronising to Layer 1; solid=Layer 2
established
Lower LED - fl=call establishing; solid=at least 1 call in place
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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1. Mains AC
Internal switch-mode supply IEC connector
Voltage range 95-240VAC autosensing
Input frequency 47-63Hz
Max current consumption 200mA @ 230VAC
2. Power – DC
-48VDC nominal
33VDC to -75VDC
0.35A max
4mm Terminal Block
MTBF – 1,790,000 hrs
3. Power - DC
-24VDC nominal
-18VDC to -75VDC
0.55A max
4mm Terminal Block
MTBF – 800,000 hrs |
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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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292mm wide x 200mm deep x 44mm high
Metal chassis, front and rear panels
Weight is 1.1Kgs 2.4lb
Optional 19’ rack-mounting kit |
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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 10 year (typical) life-time. |
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Approvals |
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All approvals completed in UK
Accredited laboratory - reports available
1. Telecomms
TBR12/TBR13
TBR4:1995, 1997 Amendment
TIA/E1A-IS/968
TNA117
AS-ACIF-S006/S016
CS-03 Canada
TIA-968-A USA
2. EMC
EN55022:1998
EN55024:1998
A12001
EN61000-3-2/3:1995
AS/NZS CISPR22:2000
3. Safety
IEC60950-1:2007
ACS/NZS60950:2000
AS/NZS3260:1993
ACA TS001:1997 |
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