1 x Cisco UC520 24 User Unified Communications Server UC520-24U-4BRI-K9. Device Type: VoIP gateway. VoIP Protocols: H.323, SCCP, SIP. 1 x Cisco 128MB - 16-2651-02. 1 x Connecting Cisco 4-Port FXS/DID Voice Interface Cards - VIC 4FXS/DID.
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