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Installation and Upgrade Guide for Cisco Unified Videoconferencing 3515 MCU12 and MCU24 Release 5.1
OL-11897-01
Chapter 1 Cisco Unified Videoconferencing 3515 MCU Functionality
Main Features of the 3515 MCU
Seamless
interoperability
The Cisco Unified Videoconferencing 3515 MCU is built on the strong
foundation of the Cisco H.323 and SIP software, ensuring full compliance
and unmatched interoperability with IP and ISDN networks.
The MCU enables H.323, SIP and SCCP devices to participate in the same
conference session.
When used with the Cisco Unified Videoconferencing 3500 Gateway, the
MCU also enables ISDN and V.35 wireless devices to participate in the same
conference session.
Intuitive web-based
management and
control
Both the Cisco Unified Videoconferencing 3515 MCU system and actual
conference sessions are managed, configured, and dynamically modified
through an intuitive, web-based interface that offers easy, high-level
conference control and administrative flexibility for an enhanced user
experience.
Supported protocols
• H.323 version 4
• SIP RFC 3261 for the Session Initiation Protocol
• SCCP
• H.243 for conference control
• RFC 2833 for in-band DTMF with SIP
• H.281 for far end camera control (FECC)
• H.235 for IP-based media encryption
• H.239 for standard simultaneous transmission of live video and
presentation sharing feeds.
• SDP (RFC 3264, 2327)
• T.120
• H.320 (when using a gateway)
Note The Cisco Unified Videoconferencing 3515 MCU supports calls
from H.323 and SIP endpoints in the same conference. Call
signalling is handled on all ports regardless of the protocol type.
Audio transcoding
codecs
• G.711 A/µ Law
• G.722
• G.722.1
• G.723.1
• G.728
• G.729 A and B
Table 1-1 Summary of Cisco Unified Videoconferencing 3515 MCU Features (continued)
Feature Description