X.21 Leased to V.36 Interface Converter
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27
Disclosed is an X.21 Leased to V.36 Interface Converter made to reduce the numbers of different interfaces that DTEs (Data Terminal Equipments) must provide to attach to different networks. A DTE designed to attach to an X.21 leased facility may also attach to a V.36 leased facility without changes to the DTE adapter. As more networks provide their DCEs with a V.36 interface which combines the electrical advantages of V.11 (balanced integrated circuit interface) with the functional advantages of V.35, the need arises to attach to those networks. The electrical characteristics of both X.21 and V.36 are identical and are V.11 so that there is no need for electrical signal conversion. Circuits 105 (RTS), 109 (RLSD) of CCITT V.24 Recommendation are assumed to be in conformance with V.11, choice valid according to V.