Hi Tuan,
I think I can help you on this matter. I have a document about telecommmunication network theory (~1100 pages), that contains the chapter about digital transmission theory (~130 pages). I think it is what you’re looking for.
Please send me an email with plexview database for apz 212 30 r8, and I will reply you with the mentioned above document.
Plz contact me at misamobile@yahoo.com. I think we have some more interesting things to exchange with each other.
Rgds