Cisco 3515 MCU24 - Manual (Page 7)

1-3
Installation and Upgrade Guide for Cisco Unified Videoconferencing 3515 MCU12 and MCU24 Releases 5.6 and 5.7
OL-17012-01
Chapter 1 Functionality
Main Features
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)
• 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
Unmatched video quality The Cisco Unified Videoconferencing 3515 MCU delivers
exceptionally high quality video and audio processing, using the
latest industry standards and leveraging upon advanced
software-upgradeable DSP chips. The Cisco QualiVision feature
provides highly improved, standard-based video quality for
networks with packet loss, assuring best video quality at all times.
The Cisco Unified Videoconferencing 3515 MCU achieves the best
video quality by supporting the following video capabilities:
• High definition and standard definition participants in the same
conference.
• H.261, H.263 and H.264 in the same conference
• A choice of 26 Continuous Presence layouts
• Up to 4 Mbps on each stream (capacity affected)
• QCIF, CIF and 4CIF in the same conference without affecting
capacity
• 720p (capacity affected)
• VGA, SVGA, XGA (supported for presentation channel only)
Table 1-1 Summary of Cisco Unified Videoconferencing 3515 MCU Features (continued)
Feature Description