Browse Prior Art Database

X.21 Leased to V.36 Interface Converter

IP.com Disclosure Number: IPCOM000034538D
Original Publication Date: 1989-Mar-01
Included in the Prior Art Database: 2005-Jan-27
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Besseyre, J: AUTHOR

Abstract

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.

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X.21 Leased to V.36 Interface Converter

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.36 CCITT Recommendation. The proposed converter is therefore reduced to a mechanical element which has on one end a female ISO 4903 connector and on the other end a male ISO 4902 connector. The figure gives the circuits correspondences for both connectors and define the hybrid converter.

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