Homework - CSIS 625 - Spring 2001 - Oelke

Due Week 6 (3/06/01) by classtime

Name:

Define the following:

Serial Transmission:

Parallel Transmission:

DTE:

DCE:

Dispersion:

Statistical TDM:

FDM:

Hamming Distance:

FEC:

1) Explain why bit stuffing is used:

2) Why is twisted pair cabling preferred over non-twisted cabling?

3) What are the benefits and costs of twisted pair cabling?

4) Explain the 5 types of Dispersion in fiber transmission systems.

5) How many trunks lines are needed to support 1000 Homes?

Given - 1.8 phones per home average. Busy hour is 3 CCS for the first line in a home, and 2.3 CCS for the second line. Use Erlang B. Show all work and include reference to which online calculator you use.

6) Compare the use of CRC's and BIP-8 for error detection.

7) CD's use a RS(32,28) error correcting code. What is the biggest burst of errors (in bits) that can be corrected?