What is the initial call request message called?
What is the Frame Format ?
What are these types of NT1 known as?
Does a Terminal Adapter always contain a Codec or Modem?
What does ISDN give you?
What are B channel charateristics?
If two ISDN channels are used together, each connecting the same pair of users, how many calls are being made?
Do you know what is the difference between internet and isdn and is both are same or is there any specific difference?
What is Fractional PRI?
 What is the name of the reference point that is located on the user side of an NT1?
A fax machine is configured to filter for analogue calls - will it accept G3 Fax calls? No, it will only accept those calls whose call type is specifically 'Generic Analogue'.
What are SPIDs?
How might a PC be configured to ensure it never answers the phone?