CCNA - Question on ISDN PRI

Author

Question on ISDN PRI

Niranjan

2002-05-18, 3:37 pm

How many B channels does a PRI contain as per the European and Australian standards

i think it's 30 --as i saw in sybex's ccna study guide.

but i saw on the cisco site that it's 31.

http://www.cisco.com/univercd/cc/td...to_doc/isdn.htm

help me out.

i'll be taking my test in another 2 days.

sec

2002-05-18, 3:41 pm

if you read the link it clearly says 30 B chanels and 1 D channel

for the exam you do not need to worry about how many pri channels there are only the BRI is tested

Niranjan

2002-05-19, 2:10 pm

Q—What are the two speeds of ISDN PRI services?

A—In North America and Japan, 23 B channels (1.472 Mbps) plus 1 D channel (64 kbps); in Europe and Australia, 31 B channels (1.984 Mbps) plus 1 D channel (64 kbps).

the above question is from the review questions part of the above mentioned link.

that's what made me to ask the question.

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