When was ISDN first defined?
1988
Where?
in the CCITT red book
What does it stand for?
Integrated Services Digital Network
Does it support video?
yes
What else?
speech
What is its key feature?
it integrates speech and data on the same lines
was this available before?
no
What does BRI stand for?
Basic Rate Interface
What kind of interface is BRI?
access interface
Can you name other kinds?
Yes
What are the name of two others?
Narrowband ISDN (N-ISDN), and Broadband ISDN (B-ISDN)
What kind of switches does ISDN use?
circuit-switches
Can you utilize any others?
Yes
Which one?
packet-switched
What does that do?
carries data
What kind of wire is used?
copper
Does this lead to better or worse quality?
Better
How many kilobits are utilized?
64 kilobit/s
Whats the max bandwidth?
128 kbit/s
Is that for both directions?
yes
What can result in a higher rate?
Channel bonding
How many are bonded?
three or four