ahill@CC7.BBN.COM ("Alan R. Hill") (09/09/86)
George, As Dr. Cerf already pointed out, the concerns you have are valid and will definitely affect the ability of the CDC interface to communicate with the DDN Standard Service. I cannot comment on the relationship between DCA Qualification and an ability to communicate effectively using the DDN but I can offer some information on what the BBN packet switch does during use of Standard Service. Standard Service will process an X.25 call by removing its X.25 transport envelope and using the contents to generate an 1822L envelope. Standard Service allows only one VC per triplet of <source address>, <destination address>, and <precedence>. Unfortunately, I believe each of your issues will prevent communication with the DDN. I would like to hear suggestions about areas for improvements in the specification or the DCA Qualification. Alan