michael@stb.uucp (Michael Gersten) (03/21/90)
Ok. I've seens lots of discussion about PEP. Now for a question: What is it? First, let me say this. I know it is the transfer protocol used in Trailblaizers. I know it works on a very wide frequency; how is the line divided? I know it is half duplex, with self turn around and some sort of interactive mode--how does this work? I know it claims about 18 000 baud throughput--what is the effective baud to send the a single character? (Assume that the last data sent was in the same direction, i.e., no turn around). Why are the transmit rates different from the two modems? (detail: I was using a pair a while back, and one modem reported a transfer rate of 18 1xx, and when I asked the other modem, I got 17 8xx). Is the half-duplex a fact of the hardware/frequency set up, or is it a fact of the current protocol? Does Telebit have any plans for a full duplex protocol, with, say, the ability to have 10 000 baud dedicated to one direction, 5 000 dedicated to the other direction, and 3 000 for the modems to talk to each other on (control channel)? Or something like that? Finally, what does happen if both systems are sending lots of data at full speed out to their modem? Michael -- Michael michael@stb.info.com denwa!stb!michael anes.ucla.edu!stb!michael Disclaimer: It works for me.