W8SDZ@SIMTEL20.ARPA (Keith Petersen) (09/03/85)
Now available via anonymous FTP from SIMTEL20: Filename Type Bytes CRC Directory MICRO:<CPM.MODEM> X-PC.DOC.1 ASCII 127850 34DFH X-PC.DQC.2 BINARY 77056 CA2CH <-same, squeezed [Keith: which MAY be the same as TYMNET offers as:] Now available from your local Tymnet sales representative: X.PC PROTOCOL SPECIFICATIONS NPD-269 $3.00 This specification is published by McDonnell Douglas as a proposal to designers and implementors of personal computer communications software and packet network systems. It defines the formats and procedures at X.PC's packet and data line layers for Data Terminal Equipment (DTE) and Data Communications Equipment (DCE). Both switched virtual call and permanent virtualy call modes of operation are defined. This specification covers DTE and DCE operation when a packet switched network is accessed through a circuit switched or dedicated connection. It also includes the additional packet layer procedures necessary for two DTEs to communicate directly (i.e., without an intervening packet switched network) over dedicated or circuit switched connection. [Keith: this is the much-talked-about "error-free terminal protocol" now supported by TYMNET. It is an interesting alternative to MICROCOM's "MNP" protocol which you must buy a new modem to get (and which requires the "other end" to also have this type modem). If we could get BBN to support the X.PC protocol in the TAC software, we could have error-free sessions in spite of occasional noise on the phone lines.] --Keith
sunny@ucb-vax.ARPA (09/05/85)
Please correct my mailing address to ...{ucbvax,decvax,ihnp4}!sun!l5!sunny
Sunny, KA6PPP