European ISDN & ImpactIQ compability

[Konstant]

Can anyone tell if there actually is an inconsistency with the european ISDN an the USA one. I just bought an 3com ImpactIQ and I'm trying to install it into a Greek ISDN line and it just wont sychronize! The D-channel LED keeps flashing (it means that it sychronizing) and its suposed to stop at some time but it just keeps going!! Pls help

 

[Telecoms]

If you're talking of E1 ISDN. Make sure to test the facility, I mean the transmission medium. To test, put a loopback from the farend and a test equipment from your end, there should be a signal and no alarm this means that ur tranmission medium ok. Now check ur ISDN configuration like HDB3(PCM 30 or 31)for E1/ Coding and framing for T1(ESF B8ZS or AMI D4). Consider also the variant. Check also who is the user side and the network side(one must be a user and the other must be a network), Hope this will help you.

Roland

 

[Konstant]

Ok, would you like to make that a bit simpler for me. You see I dont have any specialized equipment to run any tests. So any simplified thoughts would be more than welcome. Thanks

 

[chris13]

Is this the 3C882 (

http://th99.pley.org/i/0-9/53256.htm)?

Then it has an integrated NT1, uses 2 wires and line-coding which is popular in the USA (U-interface)

In europe they standardized on Euro-ISDN (DSS1 / NET3).
Usually the line comes to your house (U-interface) and terminates in a NT. This NT offers an interface (S-interface), where you can plug-in multiple devices which _don't_ have an integrated NT, use 4 wires and different line-coding and d-channel-protocol than in USA.

Your chance to use this device: If the ISDN-Line is provided by a local PBX/Switch, ask the admin if he can give you an U-interface with one of the protocols/switch-types your device is capable to talk to
(5ESS, DMS100, EWSD, NI-1).

good luck,
chris