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?
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What are Protocols on B and D channels?
How many filters can be applied to a SETUP message?
How ISDNs are connected together?
What channel do the call management messages use?
How ISDN allows multiple devices to share a single line?
Why can you not normally send data between users through the D channel?
Do you know what is the difference between internet and isdn and is both are same or is there any specific difference?
In addition to voice, name at least two other services which can be carried over ISDN.
What are these types of NT1 known as?
What is the essential difference between them?
Why use ISDN?
What is Information Field Structure?
WiFi Protocols 
