Cisco codec

Audio inputs fifteen inputs. Audio outputs eight outputs. Dual stream. Multipoint support. MultiSite features embedded multipoint. Embedded encryption. IP network features. Call control. IPv6 network support. Security features.

Certificate management. Network interfaces. Other interfaces. System management. Directory services. Operating temperature and humidity. Storage and transport temperature. Regulatory Compliance. To place an order, please contact your local Cisco representative and refer to Table 3. Table 3. Ordering Information. Product Name. Part Number. Compliance Model Number.

Configures a video codec at the dial peer level. Optional Do one of the following to configure RTP payload type:. Preferences can be used to determine which codecs will be selected over others. A codec voice class is a construct within which a codec preference order can be defined. A codec voice class can then be applied to a dial peer, which then follows the preference order defined in the codec voice class. Enters voice-class configuration mode for the specified codec voice class.

Do the following for each audio codec you want to configure in the voice class:. Configure a codec within the voice class and specifies a preference for the codec. This becomes part of a preference list. Applies the previously configured voice class and associated codecs to a dial peer. The offer-all keyword allows the device to offer all codecs configured in a codec voice class.

Applies the previously configured codec voice class and associated codecs to a dial peer. The offer-all keyword allows the device to offer all codecs configured in the codec voice class. Displays a compact version of call information for voice calls in progress. Skip to content Skip to search Skip to footer.

Book Contents Book Contents. Find Matches in This Book. PDF - Complete Book Updated: January 6, Chapter: Introduction to Codecs. Introduction to Codecs A codec is a device or software capable of encoding or decoding a digital data stream or signal. Figure 1. Restrictions for Voice-Class Codec Transparent Restrictions for Voice-Class Codec Transparent While using the voice-class codec transparent, only the offer is passed transparently without filtering.

Note You can use 'pass-thru content sdp', if you do not want to involve CUBE in the codec negotiation. Voice Media Transmission When a VoIP call is established, using the signaling protocols, the digitized voice samples need to be transmitted. RTP carries the actual digitized voice samples in a call. Specifically, the combined IP, UDP, and RTP headers are approximately 40 bytes in size, whereas a common voice payload size on a VoIP network is only 20 bytes, which includes 20 ms of voice by default.

In that case, the header is twice the size of the payload. Figure 2. In addition, sRTP provides message authentication, integrity checking, and protection against replay attacks. Voice Activity Detection Voice Activity Detection VAD is a technology that works with the human nature of voice conversations, mainly that one person listens while the other talks.

VoIP Bandwidth Requirements The amount of bandwidth required varies by the codec and the transmission media. Table 1. Table 2. Explanation of Terms Codec Bit Rate kbps Based on the codec, this is the number of bits per second that need to be transmitted to deliver a voice call.

For example, the G. Codec Sample Interval ms This is the sample interval at which the codec operates. With MOS, a wide range of listeners judge the quality of a voice sample on a scale of one bad to five excellent. The scores are averaged to provide the MOS for the codec. Voice Payload Size Bytes The voice payload size represents the number of bytes or bits that are filled into a packet. The voice payload size must be a multiple of the codec sample size.

For example, G. Voice Payload Size ms Payload Size ms The voice payload size can also be represented in terms of the codec samples. For example, a G. For example, for a G. The following codecs are supported: Table 4. This powerful codec delivers the ultimate in video collaboration. The SX80 codec is available in three integrator packages.

You can choose from three cameras, including the unique SpeakerTrack 60 dual camera active-speaker tracking system. This set delivers high-definition video quality and multiparty conferencing. Two camera options accommodate mid-to-large room sizes and configurations. It delivers the performance expected of more expensive systems in a sleek, multifeatured package.

This is an all-in-one, camera-in-codec unit.