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What is the initial call request message called?
Why is there only one D channel in each interface?
What kind of cabling is used for a PRI?
What is the purpose of the switch that all NT1s have?
Why use ISDN?
Where else is rate adaptation employed?
What is the call termination message called?
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?
An ISPBX can behave like a single user and a network - true or false? True.?
What is the device inside an ISDN telephone that converts voice into digits?
How ISDN and analogue networks interact?
How configuration errors in the ISPBX can prevent successful connections?