What the B and D channels do?
How ISDNs are connected together?
How ISDN allows multiple devices to share a single line?
What is Fractional PRI?
What are SAPIs?
Explain the call flow in nss and what is sri signal?
What is ISDN's history?
What Bearer Capabilities are and on which channel they reside?
What protocols are used?
What is LAP-D?
How can I get more information?
Why use ISDN?
How Analogue fax and modem over ISDN?
What is 2B1Q?
Do you know what is the difference between internet and isdn and is both are same or is there any specific difference?