A set of protocols for teleportation and dense coding tasks with the use of aN particle quantum channel, presented by entangled states of the GHZ class, isintroduced, when N>2. Using a found representation for the multiparticleentangled states of the GHZ class, it has shown, that for dense coding schemesenhancement of the classical capacity of the channel due from entanglement isN/N-1. If N>2 there is no one - to -one correspondence between teleportationand dense coding schemes in comparison with the EPR channel is exploited. A setof schemes, for which two additional operations as entanglement anddisentanglement are permitted, is considered.
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