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CONS is not a protocol, it is part of a service definition: X.213. CONP X.223 is one way of providing the CONS service. It is CONP that is basically X.25 as you can see even from the X.223 title. — Dgtsyb ( talk) 10:44, 25 June 2008 (UTC) reply

Actually, there are CLNP/CLNS, but CONP/CMNS (Connection-Mode Network Service), not CONS.

Actually, Connection-Mode Network Service is abbreviated CONS. See, for example, clause 4 in X.283. — Dgtsyb ( talk) 17:43, 18 November 2010 (UTC) reply

Ok, looks like CMNS is a Cisco-specific term, or just obsolete name of CONS. Dgtsyb, thanks for correction.