A user on an ISPBX can use different D-Channel protocols to those in use by the public ISDN network connected to the ISPBX - true or false?
What is the initial call request message called?
What are TEIs?
What Bearer Capabilities are and on which channel they reside?
How to Establish the Link Layer?
What are SAPIs?
What kind of cabling is used for a BRI?
How to vary the the amount of bandwidth you have available to you?
Why use ISDN?
 What is the name of the reference point that is located on the user side of an NT1?
What is the maximum number of simultaneous connections supported by a Basic Rate Interface?
What happens when a call is set up?
How many devices can be connected to a standard BRI line?