modem research! help!

[aperfectcircle]

hi, i am doing a research paper about the v.92 modem, and i need these specific topics:

line coding scheme
error detection and control
physical length limit
modulation and demodulation techniques
compression

pls help me! thanks!

[glc]

For info like that, this forum is not a decent substitute for Google - by the time someone who is an engineer finds this thread, your paper will be way overdue.