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How configuration errors in the ISPBX can prevent successful connections?
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What is the initial call request message called?
What is the essential difference between ISDN and the ordinary telephone system (PSTN)?
Do users on an ISPBX have a D channel connection to the ISPBX or to the public ISDN network? The users on an ISPBX do not communicate directly with the public network at all.
What are ISDN Services?
In addition to voice, name at least two other services which can be carried over ISDN.
How many devices may be connected to a BRI?
How might a PC be configured to ensure it never answers the phone?
Why can you not normally send data between users through the D channel?
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:
A device is configured for automatic TEI. What is its address immediately after being switched on - before it starts communicating with the network?
What device converts the signals between the ISDN and the PSTN networks?
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'.
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