ru.cisco

 
 - RU.CISCO ---------------------------------------------------------------------
 From : Slawa Olhovchenkov                   2:5030/500     22 Dec 2006  16:13:20
 To : All
 Subject : iLBC
 -------------------------------------------------------------------------------- 
 

 
 Шайтан однако.
 
 2.7.3) Internet Low Bit Rate (iLBC) Codec Support for SIP and H.323
 
 The Internet Low Bit Rate (iLBC) codec is a low-bandwidth, narrowband codec that
 operates at 13.3 kbps with a 30 ms frame size or at 15.2 kbps with a 20ms frame 
 size.
 
 iLBC is supported with the SIP and H.323 signaling protocols.
 
 iLBC is a good codec choice where a lower-bandwidth codec is required for
 impaired, unmanaged or congested IP networks that experience significant packet 
 loss.
 
 For example, iLBC is a good codec choice for a PC-based softphone client running
 over a congested VPN or for an internet telephony service that does not support 
 adequate Quality of Service (QoS).
 
 Benefits
 
 Improved Voice Quality for a low-bandwidth CodecThe iLBC codec offers slightly
 better voice quality than G.729a but less than G.711 or G.726. iLBC offers
 substantially better quality than G.729a in networks with over 1% packet loss.
 
 Graceful Voice Quality Degradation in Impaired NetworkThe iLBC codec performs
 well in networks with up to 5% packet loss.
 
 Hardware
 Routers
 Cisco AS5400XM and AS5350XM with the high-density packet voice feature card
 (AS5X-FC) and DSP module (AS5X-PVDM2-64)
 
 Product Management Contact: Steven White (whites@cisco.com)
 2.7.4) Internet Low Bit Rate codec (iLBC) Support on IP-to-IP Gateway for
 Flow-through and Flow-around Modes
 
 This feature provides support for the Internet Low Bit Rate codec (iLBC) codec
 on the Cisco Multiservice IP-to-IP Gateway for both flow-through and flow-around
 modes.
 
 This enables the iLBC codec to be deployed in both Enterprise and service
 provider environments that require interconnection between independent VoIP
 networks. A typical application for leveraging the packet-loss robustness of the
 iLBC codec would be for the interconnection of an Internet telephony service
 with a managed or hosted Enterprise VoIP network. The iLBC codec is supported on
 the Cisco Multiservice IP-to-IP Gateway for H.323 to H.323, SIP to SIP, and SIP 
 to H.323.
 
 Hardware
 Routers
 Cisco AS5400XM and AS5350XM with the high-density packet voice feature card
 (AS5X-FC) and DSP module (AS5X-PVDM2-64)
 
 Cisco 28/3800 Series Integrated Services Routers
 
 Cisco 3700 Series Integrated Access Routers
 
 Cisco 7200VXR and Cisco 7301 series Routers
 
 ... А их там было?! Их там не было!
 --- GoldED+/BSD 1.1.5
  * Origin:  (2:5030/500)
 
 

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