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Products - Liberator Summary Page - Liberator "Q" 4-port PRI switch/converter
 

Liberator "Q"

Quad-Port ISDN T1/E1 PRI mux, sharer, switch or concentrator


Stand-alone ISDN 4-port PRI ISDN switch and sharing unit. Ideal for sharing network PRIs between multiple devices and for switching between devices for resiliency purposes.

Very flexible with no restrictions on routing ISDN channels or timeslots between any port or channel - completely non-blocking and without restrictions.

Telecoms approvals for connection to carrier networks, as well as the appropriate Safety and Emissions approvals.

Highly featured, intelligent, with many routing and ISDN parameters - yet easy to use via the intuitive Manager.



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Liberator "Q" Documentation - Prices from £1,700 / $2,300 / €2,000*
   
    datasheet Datasheet
    datasheet Comparison document
    datasheet Ordering information
      Quote form
      FAQs
      Manual - register to download this information
    datasheet DbManager Comparison
      Liberator "Q" product and DbManager Movie

You might also be interested in:-
      Liberator "S" - supports 4 PRIs
      Liberator "E" - supports 8/16/24/32/40/48 PRIs
      Liberator "C" - Quad-Port ISDN T1/E1 PRI mux,
sharer, switch or concentrator
      Liberator "TDM"
* Excludes support and delivery
 
 
   
  Features  
Supports 4 ISDN PRIs
T1 ISDN or E1 ISDN user selectable














User-switchable NT/TE interfaces (connects to a network and local equipment)
Support for Fractional PRIs
Any timeslot to any timeslot connectivity - non blocking
AC or DC PSU options
Clocking hierarchy
Support for contention or overbooking
Local Call Progress Tone generation
Overlap and en-block dialling supported
Optional sophisticated number manipulation/conversion/LCR
Automatic Primary, Secondary, Tertiary routing of calls on unavailable and busy
ISDN Layer 2 and Layer 3 message capture and log for analysis
Easy and intuitive to configure via GUI management package
Very attractive pricing
Approved (Telecoms, Emissions, Safety)
RoHS compliant for Europe
diagram 1
     
Overview
Liberator “Q” (Quad) is a non-blocking 4-port PRI ISDN cross-connect switch with
advanced routing and conversion options.
Using flexible Routing Profiles, individual “B” channels or timeslots can be switched to any PRI within the unit. Call routing decisions can be performed on DDI/DID (dialled number), CLI, sub-address, call type (voice, data etc), originating port - or any combination.

Timeslots within a single PRI or across multiple PRIs can be grouped in any combination to provide Hunt Groups.

If destinations are Unavailable, Busy or not answered Secondary and Tertiary Routing Profiles can be used, making the Liberator “Q” ideal for hot-standby and resiliency applications. Calls can be routed to alternate destinations, numbers or PRI ports or channels.
Contention or over-booking is supported if required.

Liberator “Q” optionally provides a great deal of flexibility for number manipulation. Different combinations of numbers can be selected, for example the leading digits, those in the middle or at the end of a number range, and these can be modified in many ways; replacing digits, exchanging them or adding extra ones as needed. This can be used for least-cost routing, call re-direction, hiding the destination number, resilience purposes, part of a PABX migration to different numbering plans and many other applications. Number barring is also provided.
   
If BRI ports are needed see the Liberator “S”  
   
The PRI ports themselves can be connected to the network or to local devices and support either ETSI E1 PRI or ANSI T1 PRI (as well as some other variants such as the Hong Kong PRI).

DbManager is a high-quality intuitive GUI that connects to and manages/monitors Liberator “Q”; several versions are available in addition to the free DbLite supplied.

All Patapsco products are designed and manufactured to the highest standards and all are approved.
diagram 2
   
Operation  
   
ISDN Services  
   
Signaling is carried/converted between ports.
Supplementary Services from the network are passed transparently to local devices.

Sub-addressing handling and routing is supported, as is the ability to route on Bearer Capability (call type).

CLIs can be locally generated.
 
   
DbManager

Full version of DbManager showing all management windows
and image of unit to which the DbManager has connected.
   
Configuration/Management  
   
Liberator “Q” is configured and managed by Patapsco’s DbManager. See separate Tech Sheets and movie. DbManager is an intuitive GUI which supports multiple real-time workstations and is the common platform for all Patapsco products. 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
   
Ports, inter-connectivity and routing  
   
Ports, Channels and Groups  
   
Liberator “Q” employs a simple system where PRI ports or individual ‘B’ channels 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. As an example you can refer to a Group of 8 timeslots as ‘Video 1’ and subsequently use this term on all routing parameters. ‘Hunt Groups’ or ‘rotaries’ are as easy to establish.
   
Call Routing  
   
Calls can be routed on the number dialled, the sub-address, CLI, Call Type, originating port, time-of-day or a combination of the above. Whatever your routing requirements; Liberator can help.
   
Cross-Connection  
   
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 ports 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).
   
Redirection on ‘Busy’ or ‘Unavailable’  
   
Incoming calls can be automatically rerouted to alternate preprogrammed destinations if the main number is Busy or Unavailable, or after a set time (1-20 seconds). This gives the ability to automatically switch to backup or standby device for resilience purposes. Liberator supports Secondary and Tertiary destination or Routing Profiles. If a call cannot be established Liberator can automatically reroute to any other channel or PRI without the end user having to take any action and without any user visibility or impact.
   
Channel Reservation and Scheduling  
   
This features has the ability to change and structure profiles in an efficient way and to vary them if your routing or capacity requirements change during the day or week.

Time-of day

A Group can reserve a number of channels based on the time-of day.

A Group can also be configured to have a Minimum and Maximum number of destination channels available and reserved for the Group’s use.

This facility gives flexibility when allocating network access to different devices, allowing each to have a reserved minimum capacity available for immediate use. Setting the Maximum capacity means the ISDN devices can share and contend for the remaining ‘B’ channels yet any device cannot take an unfair proportion.

The Maximum and Minimum access rates can be varied based on day and time. Up to eight different profile schedules can be configured per Group. If any schedules overlap, a warning is given.
   
Least-Cost-Routing  
   
A number of options are available to assist with selecting the best route. Calls beginning or ending with particular numbers can be routed to a specific Group or ‘B’ channel. Additional Ports can be configured as secondary/tertiary destinations should the preferred Port(s) be busy or unavailable. See also the section above on ‘Redirection’ when a route or destination is unavailable. Liberator has the ability to convert or translate any incoming or outgoing number into any other number, to add/remove leading, middle and trailing digits. See “Number Translation” below.
   
Number Translation or Conversion (optional)  
   
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 because the original extension at 12345 has moved onto a VoIP gateway on a different ISDN PRI and the user now 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 subaddresses and CLIs. All of this flexibility is not required by all, but if you should need it, it is easy to use and configure.
   
Tone Generation  
   
Liberator normally passes the tones transparently between ISDN points but this is not always possible in all instances. Examples of such instances are some least-cost routing applications, if there is no network at all, or in certain other circumstances where routing decisions need to be taken only once the digits are dialled. In these instances, Liberator can be configured to generate dial, ring, busy, N/U tones.
   
CLI Generation  
   
Liberator is able to generate a CLI field. The number of the CLI can be programmed for individual ports or calling numbers.
   
General  
   
Software-selectable clock source using any PRI interface or Internal Clock. Auto-switchover to secondary/tertiary clocks on clock loss. Internal clock accurate to +/- 10ppm.
   
Clocking  
   
Software-selectable clock source using any PRI interface or Internal Clock. Auto-switchover to secondary/tertiary clocks on clock loss. Internal clock accurate to +/- 10ppm.
   
Real-Time Clock  
   
Internal battery-backed real-time clock for Event Log time-stamps and debugging purposes.
   
Events  
   
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.
   
Routing and Prioritisation Summary Windows  
   
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.
 
Diagnostics
 
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.
 
Approvals
 
The Liberator “Q” benefits from a wide range of approvals for connection to ISDN services. See Section 5.8. All Patapsco equipment is RoHS compliant.
 
Configuration
 
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.
 
Software
 
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.
 
Specification
 
Interfaces
 
PRI/E1/T1 - 1, 2, 3 or 4 PRI ports.
Marked as ‘PRI21’ ‘PRI22’ ‘PRI23’ and ‘PRI24’
By default PRI21 and PRI23 are configured for TE ISDN stack (user-side); PRI22 and PRI24 for NT (network-side)
The default configurations can be changed by the user but crossed cables are necessary Interfaces PRI21 - PRI22 and PRI22 – PRI24 are protected against power failure by relays which provide a metallic path in the event of failure.
E1
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
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
Ethernet RJ45 Marked ‘LAN’ 10baseT or 100baseT
Password protected
 
LEDs
 
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
 
Relays
 

Interfaces pairs PRI21 and PRI22 and PRI23 and PRI 24 are Power-
Failure Relay protected.

Interfaces will be connected together using relays in the event of
power failure. This forms a metallic path between the two ports

 
Power
 
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
 
Environment
 
Operating 0 – 55 °C
Humidity 10-90% non-condensing
Natural convection cooling
 
Physical
 
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
 
Maintenance
 
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.
 
Approvals
 
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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