What is the initial call request message called?
What is the D channel used for?
Why is this information significant?
Name the two forms in which an ISDN service can be provided to the user. ISDN can be supplied to the user in two forms:
What other method is there for converting synchronous and asynchronous data?
What are SPIDs?
How ISDN allows multiple devices to share a single line?
What is Soft-fax and Soft-modem?
What is 2B1Q?
What information also accompanies this message?
How can I get more information?
What is the essential difference between ISDN and the ordinary telephone system (PSTN)?
Name two significant differences between B and D channels.