What is Fractional PRI?
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In addition to voice, name at least two other services which can be carried over ISDN.
What is Soft-fax and Soft-modem?
 What is the name of the reference point that is located on the user side of an NT1?
What is LAP-D?
What kind of cabling is used for a PRI?
What are SAPIs?
How configuration errors in the ISPBX can prevent successful connections?
What does ISDN give you?
Where does this conversion normally take place?
How the structures of BRI and PRI compare
What channel do the call management messages use?
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'.