S-72.423 Telecommunication Systems
Exercise 2.
9.10.2001
ISDN
1. Describe briefly ( 1 p.):
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LAPD
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Bearer services, teleservices and supplementary services in ISDN
2. ISDN assignment: (1 p.) (max 2 pages)
Describe the S and U interfaces of a BRA (basic rate access) N-ISDN
connection:
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where are the interfaces used
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relevant ITU-T standards
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protocol layers (do not go into protocol details)
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signal structure, transmission method and bit rates
(these are layer 1 or physical layer aspects)
Return your answers no later than on Tuesday 23.10.2001
Return your answer into the course's P.O. box at the third floor
of the E-wing.
You may aswer in English, Finnish or Swedish.
Please, include the following information in your answers:
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Your name
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Your student number