Defense Data Network C/30E Physical Layer Interface Guide

摘要

Purpose. This circular prescribes the policy, assigns the responsibility, and identifies the requirements for connecting an X.25 host to a C/30E PSN by means of a MIL-STD-188-114 (balanced), EIA-232-D, or V.35 interface. This circular also identifies the requirements for connecting one C/30E PSN to another by means of a MIL-STD-188-114 (balanced), EIA-232-D, or V.35 interface, as well as for the BELL 303 interface. Keywords: Digital computers, Electrical terminals. (jes)