How ISDN and analogue networks interact?
What protocols are used?
How the B and D channels share the line?
How to vary the the amount of bandwidth you have available to you?
What the B and D channels do?
How ISDN allows multiple devices to share a single line?
Bearer Capabilities - What are they?
What is ISDN's history?
What is Information Field Structure?
How configuration errors in the ISPBX can prevent successful connections?
How ISDNs are connected together?
What are SPIDs?
What is Soft-fax and Soft-modem?
What item of equipment would be required to connect a modem to ISDN? A terminal adapter.
What do the layers look like?