Hi I am installing  an rpm file "freeswitch-sounds-music-48000-1.0.8-5.1.noarch.rpm"

but getting hthis error
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warning: 222.rpm: Header V4 RSA/SHA1 Signature, key ID ac25decd: NOKEY
error: Failed dependencies:
    freeswitch is needed by freeswitch-sounds-music-48000-1.0.51-2.el6.noarch
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