This topic describes how to configure compression options for VComp bundles.
Before you begin:
To configure compression parameters for VComp bundles using CTPView:
Table 1: VComp Bundle Compression Parameter Settings in CTPView
Field | Function | Your Action |
---|---|---|
Companding | Specifies the pulse-code modulation (PCM) encoding standard used on the port PCM input to the VComp bundle. When a VComp bundle is built with:
Generally, mu-law is used in the US, and a-law is used in Europe and elsewhere. | Select one:
|
Codec | Specifies the level and type of voice compression performed on voice channels. See Calculating Resource Usage on Voice Compression Modules Overview for information about the voice compression module utilization and compression level for each compression type. | Select one:
|
Echo Cancellation | Enables or disables echo cancellation. When this option is enabled, 32 ms of local tail echo cancellation is performed on every bundle channel. | Select one:
|
Silence Detection | Enables or disables silence detection. When this option is enabled and silence is detected on the channel, the network bandwidth used for that channel is reduced drastically. This behavior can create significant network bandwidth savings. | Select one:
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Fax/Modem Support | Enables or disables detection of fax and modem tones. When enabled and fax or modem tones are detected on the line, compression is disabled and the channel reverts to PCM. Although enabling this attribute increases the amount of network bandwidth needed for that channel in the bundle for the duration of the fax or modem session, it succeeds in negotiation and transfer of fax and modem data at high speeds. | Select one:
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Tone Relay | When enabled and tones are detected at the local end port, they are transported and regenerated at the remote end. This is an important option particularly for high compression levels, where tones may be distorted if they are compressed. The tone relay types supported are DTMF and MFR1. | Select one:
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