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Best Add-ons/3rd party hardware?

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On 3/16/2017 at 5:43 AM, ERDrPC said:

Door video intercom

Why can't C4 license crestron's SIP protocol or further develop their own.

  1. Actually Control4 has been using SIP for their intercom since the beginning. There's even a generic SIP client driver provided by Control4 and a generic SIP door station driver provided by an external developer.
  2. SIP is not Crestron's protocol at all. It's an open IETF standard/spec. https://tools.ietf.org/html/rfc3261

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