On platforms that support the C549 DSP technology, the codec complexity is configured
on the voice card (for example, the 2600/3600/VG-200 High Density Voice Network
Module). Some platforms support only high complexity because they have enough DSPs
onboard to support all T1/E1 channels that use the high complexity mode. To specify call
density and codec complexity according to the codec standard that is used, use the codec
complexity command in voice-card configuration mode.
Consider Examples 2-1 and 2-2, which show the supported codec complexity modes for
the C549 and C5510 DSPs, using context-sensitive help. Notice the C5510 DSPs support a
flex complexity mode, which allows the DSPs to automatically switch into the optimal
complexity mode for a given call, unlike the C549 DSPs, which require you to use the high
complexity mode (which supports the fewest number of calls) if the DSPs ever need to run
in high complexity mode.
Example 2-1 Configuring Codec Complexity on C549 DSPs
96 Authorized Self-Study Guide: Cisco Voice over IP (CVOICE)
Router(config)#voice-card 1
Router(config-voicecard)#codec complexity ?
high Set codec complexity high. High complexity, lower call density.
medium Set codec complexity medium. Mid range complexity and call density.
Router(config-voicecard)#codec complexity high
Router(config-voicecard)#