Liberator "S"
Q. What are the Model numbers I need to order?
Q. I only need 1 PRI port now but how do I upgrade to more later?
Q. I only need 8 BRI ports now how do I upgrade to 16 later?
Q. How many PRI and/or BRI ports does Liberator support?
Q. What interfaces do the PRIs support and what should I order?
Q. Does it have analogue ports?
Q. Does Liberator support BRI TE presentations so it connects to a BRI network?
Q. Does
Liberator support USA-based PRI 23 “B” channels?
Q. What ISDN standards does Liberator support?
Q. How can I route calls out via two different Carriers
Q. Does Liberator support Least Cost Routing?
Q. Is CLI information passed through Liberator?
Q. Can Liberator convert between E1 and T1?
Q. Does Liberator pass TCS4 digits?
Q. Can I change the capacity available to a device?
Q. What
is the relevance of the “minimum and maximum” capacity
levels?
Q. How do I configure the Liberator?
Q. Can I access Liberator remotely?
Q. What visibility can I have of multiple units in
a network?
Q. What happens if Liberator fails or loses power?
Q. Can I “daisy-chain” Liberators?
Q. Where do clocks come from?
Q. Are
Events & Alarms saved and battery-backed?
Q. Are there any call limitations between ports?
Q. Is there any limit to the number of calls?
Q. Will Liberator notify me of any problems?
Q. Can
I see the unit’s status from the front?
Q. Is the unit Power-Failure Relay Protected?
Q. Is there an upgrade path?
Q. Does Liberator support BRI Power Feed?
Q. Is there technical product information on the site?
Q. Liberator does not have enough ports. Is there anything larger?
Q. How do I split a PRI between two local PRI devices?
Q. Does Liberator support USA-standard PRI?
Q. My application is not illustrated. Might you still help?
Q. What are the Model numbers I need to order?
The flexibility and combinations of ports, power options and country-specific versions means there are a substantial number of variants. There are pricing examples available on the web site once registered. A description of the products and how the Part Numbers work is on the Ordering Information pdf. Back to top
Q . I only need 1 PRI port now but how do I upgrade more later?
Two versions of Liberator with
a single PRI are available. One is populated with just one PRI but
there is an option for Liberator to be populated with 4 PRI ports
so when purchased as a single PRI device it can be remotely upgraded
to 2, 3 or 4 PRI/E1s at any time. Back to top
This important flexibility is typical of the overall design of the product
and Patapsco's intention to simplify life for customers and distributors.
Q. I only need 8 BRI ports now how do I upgrade to 16 later?
There are a number of models with different numbers and types of BRI ports available.
Typically the units come with 4, 8, 12 or 16 BRIs. The 8 port versions are also available populated with 16 BRI ports so the extra 8 BRIs can be enabled at a later date when required.
There is also a 4-port BRI version which can be field upgraded to 8. Back to top
Q. How many PRI and/or BRI ports does Liberator support?
The maximum number of PRIs and/or E1 interfaces
is four.
The maximum number of BRI interfaces is 16 (32 "B" channels).
Different models support different combinations and the BRIs can be NT only(network
presenting) or user-switchable between NT/TE (TE connects to a network).
When using TE ports a crossed cable is required.
Liberator is available with a single PRI/E1; a single PRI/E1 and which is subsequently
remotely upgradeable to 2, 3 or 4 PRIs, 2 PRI/E1s which can be remotely upgraded
to 3 PRIs, 3 PRI/E1s upgradeable to 4, or 4 PRIs.
Models support 0, 4, 8 or 16 BRIs and optionally 4 port versions which can be field upgradeable to 8 and 8 port versions which can be remotely upgraded to 16 BRIs. Back to top
Q. What interfaces do the PRIs support and what should I order?
Any of the PRI ports can be user switched between all E1 (ETSI) or all T1 (ANSI).
Ports can be NT or TE, although by default ports 21/22 and 23/24are set for NT and TE and the pairs are power failure relay protected.
Back to top
Q. Does it have analogue ports?
No, sorry. The current versions of the Liberator
support digital PRI E1 and
BRI “S” interfaces. Back to top
Q. Does Liberator support BRI TE presentations so it connects to a BRI network?
Yes. The Liberator can be purchased with NT only BRI ports or user switchable between NT/TE. Nt/TE ports are in blocks of 4, so an 8 port unit could have 4 NT and 4 TE or 8 of each.
Back to top
Q. Does
Liberator support USA-based PRI 23 “B” channels?
Yes, Liberator supports T1 ISDN with various switch options as well as US-based BRIs. All are software configured and the BRIs can support dual SPIDs and dual TEIs. Liberator is also optionally capable of converting between E1/T1 and US/Euro BRIs in many different combinations. Back to top
Q. What ISDN standards does Liberator support?
The Liberator currently supports ETSI Q.931 Euro-ISDN and ANSI plus the Hong Kong variant, PRI NT or TE. Various T1 switch options are available.
BRI is NT (looks like a network) "S" interfaces with optional Power Feed and BRI TE (acts like CPE). Liberator supports dual SPIDs and other ANSI based parameters. Back to top
Q. How can I route calls out via two different Carriers?
Liberator has sophisticated
but simple-to-use configuration tables which allow calls to be directed
to one of two PRI ports (with perhaps different Carriers) depending
upon the number dialled.
Customers can take advantage of the best tariffs depending upon destination and
these parameters can be configured to change depending upon the time-of-day as
Carriers charges often alter during the day or weekend. Back to top
Q. Does Liberator support Least Cost Routing?
Yes, either by using
two separate Carriers or one Carrier which routes to a second Carrier from within the first Carrier’s
network – often called Carrier Pre-Select.
When two Carriers are connected to Liberator it will route calls depending upon
the time-of-day and preferred configured routing paths.
With Carrier pre-select and only one PRI interface, Liberator adds digits to
the appropriate out-going calls so the first Carrier passes the call to the second
Carrier. Back to top
Q. Is CLI information passed through Liberator?
Yes, CLI from in-coming
calls is passed in the call set-up information to the called destination. Back to top
Q. Can Liberator convert between E1 and T1?
Yes. Liberator can optionally convert between E1 PRI and T1 PRI. You may wish to also look at teh Liberator "C" which is specifically targetted at E1/T1 PRI conversion. Additionally BRI conversion from ETSI to ANSI is available as standard. Patapsco's Liberator "C" is specifically designed for E1 T1 conversion. Back to top
Q. Does Liberator pass TCS4 digits?
Yes, TCS4 digits
from in-coming calls are passed in the call set-up information to the
called destination providing the digits all arrive together in the
set-up message. Back to top
Q. Can I change the capacity available to a device?
Yes. We appreciate that different devices have different
traffic profiles, some needing more capacity during the daytime and
less at night and other perhaps the opposite.
Liberator can have different profiles which allow devices to have different
minimum and maximum access levels at different times of the day. Back to top
Q. What
is the relevance of the “minimum and maximum” capacity
levels?
This important feature means a local ISDN device, or
a group of devices can be configured with the Minimum number of “B” channels
available to it, and the Maximum it is allowed to access.
Take as an example a site with a PABX on a PRI line, a router on a PRI and
a group of BRI ports, all sharing a single PRI via Liberator. During the day you could configure the PABX with a Minimum of 10 channels
and a Maximum of 15; the router with a Minimum of 4 and a Maximum of
10; the BRI group with a Minimum of 2 and maximum of 8. Overall, the total sum of Minimum channels is 10+4+2=16 These channels
are held in reserve for the appropriate devices so they are immediately
available for access. This leaves a “float” of 14 channels
available from the PRI.
These “floating” or shared 14 channels can be accessed as-required
by any of the three ISDN devices, up to their maximum allocation, on a first-come
basis.
The “float” or shared channels means the ISDN services is used
most efficiently but with all devices having allocated a minimum service level.
Back to top
Q. How do I configure the Liberator?
Patapsco supply our Carrier-Grade DbManager system for management.
It is a simple-to-use but sophisticated graphical package based on a Windows PC.
A version which supports a single management station and a single Liberator
is shipped with each product.
Versions for larger systems and Carriers supporting up to 15 simultaneous workstations in real-time and many Liberators (and other Patapsco products) are also available.
Physical access is via a RJ asynchronous port, a USB, a LAN (Ethernet) port or remotely via an ISDN call. Back to top
Q. Can I access Liberator remotely?
Yes, as well as the local access option via RJ connector,
USB or Ethernet, you can place an ISDN call to Liberator which will
give management access, just as if you were locally connected.
Liberator can also report Events and Alarms automatically via an ISDN call
to a centralised Manager. Back to top
Q. What visibility can I have of multiple units in
a network?
Versions of Patapsco’s DbManager support multiple
real-time workstations and thousands of remote Patapsco products, such
as Liberator.
Each Liberator can be configured to report Alarms and Events and Call Records
to the management system and the status of each unit is displayed on a graphical
user interface.
The Manager can access any remote unit via an ISDN call by simply double-clicking
on the icon on the GUI, or if direct LAN access is available, by this route. Back to top
Q. What happens if Liberator fails or loses power?
If the unit fails and there two PRI ports, one to the
network and one to a local DTE, relays close making a direct metallic
connection between the network and the local device. Back to top
Q. Can I “daisy-chain” Liberators?
Yes. It is possible to design a very flexible system.
Note that when daisy-chaining one Liberator will
need an NT PRI presentation at on end of the cable and the other a TE. You may also want to see the Liberator "E" which supports more PRIs. Back to top
Q. Where do clocks come from?
Any PRI port and any BRI TE port can be configired as a clock source, or the internal 10ppm source. Any/all ports can be configured in a heirachy.
If the primary clock source fails Liberator will automatically source clock from
the secondary clock, and so on down the list and will switch back to the primary when it returns.
Alarms are generated. Back to top
Q. Are
Events & Alarms saved and battery-backed?
Yes. Liberator stores approximately 5,000 Events in
battery-backed memory.
It is possible to configure a remote call to the Management system to “dump” the
Event buffer when it reaches 90% full.
The buffer over-writes on a FIFO basis.
Battery life is typically 10 years. Back to top
Q. Are there any call limitations between ports?
None by Liberator. Any port or “B” channel
can call any other.
Call-barring and restricting routing can be done via the manager if required. Back to top
Q. Is there any limit to the number of calls?
No. The unit can be fully used to its maximum configuration. Back to top
Q. Will Liberator notify me of any problems?
Yes, it can report through its local asynch, USB or
Ethernet ports to the DbManager or place an ISDN call to a remote network
management centre. Back to top
Q. Can
I see the unit’s status from the front?
Yes. There is a comprehensive LED display. The LEDs
and meanings are covered in the Technical Datasheets.
When connecting to the unit via the DbManager, the operator sees a representation
of the front and rear of the Liberator with the LEDs displayed as they are on
the unit itself. In this way the operator sees exactly the same display as if
he were in front of the unit and can quickly identify the Liberators status and
calls in place. Back to top
Q. Is the unit Power-Failure Relay Protected?
PRI/E1 pairs of ports 21/22 and 23/24 which present as TE and NT are
power-failure relayed. These ports would normally
be connected to the network and to a local device.
If Liberator loses power a metallic path is made which connects the local device
directly to the network so services are maintained. Back to top
Q. Is there an upgrade path?
It depends upon the Liberator model originally purchased,
but normally “yes”.
See the Ordering Information pdf
Software upgrades can be done locally or remotely with code loaded to an off-line FLASH sector which can be switched to at any time. Back to top
Q. Does Liberator support BRI Power Feed?
Yes.
The optional Phantom Power or Power Feed versions come with an external AC/DC supply which enables
the BRIs to supply Power Feed. Details are in the Technical Datasheets.
This is a factory-fit option and must be purchased at the time of initial order. Back to top
Q. Is there technical product information on the site?
Yes. Unusually this site has a great deal of technical
info and pricing. Back to top
Q. Liberator does not have enough ports. Is there anything larger?
Yes. Patapsco's DB120 chassis supports a wide number
of cards including NT/TE PRI and NT/TE BRI. If you need just more PRIs look at Liberator "Q" (4 PRIs) or Liberator "E" (up to 16 PRIs) Back to top
Q. How do I split a PRI between two local PRI devices?
Liberator can take a single PRI from the network and
present two or three PRI interfaces to local devices.
These can be used for resiliency purposes as well, switching calls to stand-by devices. In addition to the PRIs Liberator can also provide local BRI interfaces.
Channelised Fractional E1s can also be supplied. Back to top
Q. Does Liberator support USA-standard PRI?
Yes, Liberator supports T1 ISDN with various switch options as well as US-based BRIs. All are software configured and the BRIs can support dual SPIDs and dual TEIs. Liberator is also capable of converting between E1/T1 and US/Euro BRIs in many different combinations. Back to top
Q. My application is not illustrated. Might you still help?
Of course! If we can help you we will and if we know
of some non-Patapsco solution to your question we will direct you as
best we can. Please contact us for more information.
Should you be unable to find the answer you seek, or are having difficulties, please contact us referencing any Support Agreement. |
