art@ACC.ARPA (10/04/88)
>From: "Alan R. Hill" <ahill@CC5.BBN.COM> > >Rick, > I'll probably regret this but I have to ask why you have the >impression that the IMP will not accept messages exceeding 1006 bytes? >The X.25 limit is 1024. The 1822 limit is 8063 bits and the DDN >X.25 Standard service limit is 8056 bits or 1007 bytes. Can you >shed some light on where the 1006 byte number originated? > >Thanks, >Alan Alan, I suspect that it dates back to old 1822 interfaces. As you indicated, for 1822, the limit is 1007 whole bytes. But interfaces like the LH-DH/11 were 16-bit word oriented and therefore had a limit of 1006 bytes. (IMP padding still occasionally nailed drivers not expecting more data coming in than could be sent out) +-----------------------------------------------------------------------+ | Art Berggreen Advanced Computer Communications | | <art@acc.arpa> 720 Santa Barbara Street | | (805)963-9431 Santa Barbara, CA 93101 | +-----------------------------------------------------------------------+