ISDN Simulator Technical FAQs -
for additional help please see  Movie.
- Q. I can’t hear any tones on my ISDN equipment. Why?
- Q. The tones my Simulator generates sound very distorted!
- Q. What is the difference between the switch types in the T1 PRI/US BRI options?
- Q. How do I know if the BRI ports should be set to Point-to-point or Multipoint?
- Q. Is there a way that I can look at how many calls are currently active?
- Q. Does Liberator Simulator support BRI TE presentations so it connects to a BRI network?
- Q. Does Liberator Simulator support USA-based PRI 23 “B” channels?
- Q. Can I route calls according to the number dialled (DDI)?
- Q. Can I route calls according to Calling Line Identifier (CLI)?
- Q. Can I route calls based on Call type (3Khz Audio, Unrestricted Data, Video etc)?
- Q. Can I use Liberator Simulator as a drop & insert mux?
- Q. Can I change Routing profiles according to Time of Day?
- Q. Can I use Liberator Simulator to manipulate dialled number strings?
- Q. Can I “Bar” certain numbers?
- Q. Can I route calls to an alternative destination?
- Q. What ISDN standards does Liberator Simulator support?
- Q. Is CLI information passed through Liberator Simulator?
- Q. Can Liberator Simulator convert between E1 and T1?
- Q. What is “Power Feed” or “Phantom Power”?
Q1. I can’t hear any tones on my ISDN equipment. Why?
Simulator has options for providing tones to local devices on a per-port basis. The tone settings can be found on the configuration settings for each BRI and PRI port. Back to top
Q2. The tones my Simulator generates sound very distorted!
The tone options allow configuration of two types of tone; A-law and µ-law. A-law tones are commonly used in most of the world except in North America and Japan, where μ-law is more common. If the tone type is set incorrectly for the connected device, the tone will sound distorted. Try switching the tone type if you are unsure whether the connected device is A-law or μ -law. Back to top
Q3. What is the difference between the switch types in the T1 PRI/US BRI options?
There are three options under Switch Type: National ISDN 2, DMS-100 and AT&T 5E-SS. Each option forces the port to use different Numbering Plan and Numbering Type information elements:
Switch Type |
Number Type |
Number Plan |
National ISDN 2 |
National |
ISDN |
DMS-100 |
Unknown |
ISDN |
AT&T 5E-SS |
Unknown |
Unknown |
When a call is routed out on a US BRI port, it will be sent on with the Type and Plan associated with that Switch Type. Back to top
Q4.How do I know if the BRI ports should be set to Point-to-point or Multipoint?
All BRI ports default to Point-to-point mode, in which TEI values are dynamically assigned to calls as they arrive. Multipoint mode allows up to 8 devices to be connected to a single BRI interface, and should only be used if the BRI device connected supports it. Back to top
Q5. Is there a way that I can look at how many calls are currently active?
If a ‘full’ version of DbManager is in use, the current status of calls can be checked by selecting the Connected to Device window and going to View - Call Status. In recent versions of DbManager (including Lite versions), this option can also be found under the Terminal port settings on the device. The Outstanding Events window within DbManager can also be used to determine the status of current active calls. Back to top
Q6. Does Liberator Simulator support BRI TE presentations so it connects to a BRI network?
No, all ISDN connections on the Liberator Simulator are NT. If you require TE interfaces please refer to the Liberator S product range. Back to top
Q7. Does Liberator Simulator 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 capable of converting between E1/T1 and US/Euro BRIs in many different combinations. Back to top
Q8.. Can I route calls according to the number dialled (DDI)?
Yes, Liberator Simulator has a very powerful routing engine. It is possible to configure multiple routing table entries that define the profile of a specific call and where that call should be routed. Routing can be performed on incoming port number, DDI number, CLI number, Sub addressing, call type (3Khz voice, unrestricted data, video etc) or a combination of all these options. Back to top
Q9. Can I route calls according to Calling Line Identifier (CLI)?
Yes, Liberator Simulator has a very powerful routing engine. It is possible to configure multiple routing table entries that define the profile of a specific call and where that call should be routed. Routing can be performed on incoming port number, DDI number, CLI number, Sub addressing, call type (3Khz voice, unrestricted data, video etc) or a combination of all these options. Back to top
Q10. Can I route calls based on Call type (3Khz Audio, Unrestricted Data, Video etc)?
Yes, Liberator Simulator has a very powerful routing engine. It is possible to configure multiple routing table entries that define the profile of a specific call and where that call should be routed. Routing can be performed on incoming port number, DDI number, CLI number, Sub addressing, call type (3Khz voice, unrestricted data, video etc) or a combination of all these options. Back to top
Q11. Can I use Liberator Simulator as a drop & insert mux?
No, the Liberator Simulator does not support G703/G704 interfaces. If you require D&I functionality please refer to the Liberator S product range.Back to top
Q12. Can I change Routing profiles according to Time of Day?
Yes, Liberator Simulator offers ToD configuration for active profiles. You may wish to route calls in one manner during the day with the ability to route to another destination over night. Back to top
Q13. Can I use Liberator Simulator to manipulate dialled number strings?
Yes, Liberator Simulator has a powerful call conversion engine. This allows modification/ addition of digits to the DDI/CLI and SubAdd fields. Back to top
Q14. Can I “Bar” certain numbers?
Yes, Liberator Simulator offers a call baring facility. It is possible to define certain call profiles which you do not want routed. Back to top
Q15. Can I route calls to an alternative destination?
Yes, Liberator Simulator can have a Primary, Secondary and Tertiary destination configured for each routing profile. Should the call not be routed to the Primary it will automatically try the other two destinations. The re-route facility relies on the call remaining active to allow sufficient time for re-routing. Back to top
Q16. What ISDN standards does Liberator Simulator support?
The Liberator Simulator currently supports ETSI Q.931 Euro-ISDN and ANSI. PRI. Various T1 switch options are available. ISDN interfaces are all NT (looks like a network) "S" interfaces with optional Power Feed. Liberator supports dual SPIDs and other ANSI based parameters. Back to top
Q17. Is CLI information passed through Liberator Simulator?
Yes, CLI from in-coming calls is passed in the call set-up information to the called destination. Back to top
Q18. Can Liberator Simulator Simulator convert between E1 and T1?
Yes. Liberator Simulator can optionally convert between E1 PRI and T1 PRI. Additionally BRI conversion from ETSI to ANSI is also available. Also see Patapsco's Liberator "C" which is specifically designed for E1 T1 conversion. Back to top
Q19. What is “Power Feed” or “Phantom Power”?
Power Feed is used to supply approximately 40VDC 1W to BRI devices such as ISDN Phones which do not have their own power supply. ISDN devices with their own power supply normally do not require Power Feed.
There are three types of Power Feed:
PS1/Phantom. -40VDC 1W across pairs 3/6 and 4/5
PS2. -40VDC 8W uses wire pair 7/8
PS3. -40VDC 8W uses wire pair 7/8 (Non-ETSI)
Patapsco Simulator devices support the more common PS1/Phantom Power Feed. This feature is a hardware add-on which must be purchased withSimulator devices at the time of ordering. An external 100-240VAC to -40VDC power supply, which must be connected to Simulator as well as the usual mains connection is supplied with the unit. Simulator devices can be purchased with Power Feed fitted for ports in blocks of four, and Power Feed can be enabled and disabled on a per-BRI port basis. Back to top
Should you be unable to find the answer you seek, or are having difficulties, please contact us referencing any Support Agreement. |
