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  1. Member cleveoh's Avatar
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    Dec 2010
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    #1

    Default (DSP) Module (PVDM2)

    I need a DSP card for my 3725, what's the difference between the different channels (8-64)?
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  3. Cisco Moderator mikej412's Avatar
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    May 2005
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    #2
    It will determine the number of transcoding sessions and conference calls your router can support.

    Configuring Enhanced Conferencing and Transcoding for Voice Gateway Routers [Support] - Cisco Systems
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  4. Member
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    Dec 2010
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    CCNA, CCNP, CCDP
    #3
    You probably want to grab an NM-HD-2VE for that router if this is going in your home lab which supports up to 48 channels I believe. I have a 3745 and that's what I use for a PSTN router
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