RAS and Telebit PEP (97977)
This article was previously published under Q97977
SUMMARY
It is recommended that you do not use Telebit's proprietary PEP
compression method with Microsoft Remote Access Service (RAS). It will
actually slow down data throughput rates with RAS.
MORE INFORMATION
PEP is a method implemented in some Telebit modems to get higher data
throughput over slower DCE rate. Using a normal terminal for file
transfer over a 9600 bps PEP connection, you may actually get DTE
throughput closer to 19,200 bps. RAS is more of an interactive
application that both sends and receives smaller packets of data. A
PEP connection with RAS is actually much slower than a non-PEP
connection at the same DCE bps. The reason is that PEP holds back
small packets of data to compress them when more packets of data come
from the system. This has the effect of holding back NBFs\AsyBEUIs
acknowledgment frames. Hence, frames are resent, timeouts occur, and
in general things slow down. A straight 9600 bps connection without
PEP is actually faster for RAS.
| Modification Type: |
Major |
Last Reviewed: |
7/30/2001 |
| Keywords: |
KB97977 |
|