1. I can tell a router from a multiplexer. When I say multiplexer, I mean
the gear that makes a single T1 (or E1) from multiple 64 kbps channels. It
is this gear that detects the 'CRC errors' the original enquirer was
asking about. I has hoped that this was clear from the supplied description.
2. If you believe that errors are corrected at the Data Link Layer, then
you have been using X.25 too much. Standard PPP practice is to detect
corrupted frames, and to drop them (here I admit an error in my preceding
message - I got carried away and said that those frames were passed to IP
anyway). Only if the extensions described in RFC 1663 (PPP reliable
transmission) are actually implemented, can one talk about Data Link
Layer level error correction. I have yet to encounter such an implementation=
=2E
/AF
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