What the B and D channels do?
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If none of the equipment connected to an NT1 requires a power supply through the interface, do I need to attach the NT1 to the mains?
What address does an ISDN PRI line always use?
A device is configured for automatic TEI. What is its address immediately after being switched on - before it starts communicating with the network?
What determines which of these two protocols to use?
Why can you not normally send data between users through the D channel?
How ISDN and analogue networks interact?
What other method is there for converting synchronous and asynchronous data?
What are the two ISDN device addressing methods? The two types of device addressing in ISDN are known as:
How users are connected to a public ISDN through an ISPBX?
Number of devices equals number of subscriber numbers required for MSN - true or false?
What is LAP-D?
 What is the name of the reference point that is located on the user side of an NT1?