Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.

What causes an ISDN call to be abnormal?

April 26, 2017causes ISDN

0

Posted

What causes an ISDN call to be abnormal?

1 Answer

0

Posted

1) Abnormal frame synchronization signal on local or remote E1; 2) ISDN is not properly configured as network side or user side; 3) Incorrectly configured CRC check switch; 4) Incorrectly set TEI (terminal endpoint identification) value; 5) Incorrectly configured representation of channel identification information (number or timeslot diagram) for outgoing calls on ISDN link; 6) The telecoms service provider does not offer the relative service or service data concerned are not ready. A good way to deal with such problem is to record the PBX information by our boards and then modify the on-board information to be consistent with that about PBX.