Voice Parameters

Global parameter defining the pulse-code modulation (PCM) input (received) gain control level (in decibels).

You can also configure the feature per specific calls, using IP Profiles ('Input Gain' parameter) or Tel Profiles ('Input Gain' parameter). For a detailed description of the parameter and for configuring the feature, see Configuring IP Profiles or Configuring Tel Profiles.

Note: If the feature is configured for a specific profile, the settings of the global parameter is ignored for calls associated with the profile.

Global parameter defining the voice gain control (in decibels). This defines the level of the transmitted signal (for the Gateway application, in IP-to Tel calls).

You can also configure the feature per specific calls, using IP Profiles ('Voice Volume' parameter) or Tel Profiles ('Voice Volume' parameter). For a detailed description of the parameter and for configuring the feature, see Configuring IP Profiles or Configuring Tel Profiles.

Note: If the feature is configured for a specific profile, the settings of the global parameter is ignored for calls associated with the profile.

Determines the bit ordering of the G.726 voice payload format.

Note: To ensure high voice quality when using G.726, both communicating ends should use the same endianness format. Therefore, when the device communicates with a third-party entity that uses the G.726 voice coder and voice quality is poor, change the settings of the parameter (between Big Endian and Little Endian).

Global parameter enabling echo cancellation (i.e., echo from voice calls is removed).

You can also configure this feature per specific calls, using IP Profiles ('Echo Canceler' parameter) or Tel Profiles ('Echo Canceler' parameter). For a detailed description of the parameter and for configuring the feature, see Configuring IP Profiles or Configuring Tel Profiles.

Note: If the feature is configured for a specific profile, the device ignores this global parameter for calls associated with the profile.

Defines the four-wire to two-wire worst-case Hybrid loss, the ratio between the signal level sent to the hybrid and the echo level returning from the hybrid.

Global parameter enabling Non-Linear Processing (NLP) mode for echo cancellation.

You can also configure the feature per specific calls, using Tel Profiles ('EC NLP Mode' parameter). For a detailed description of the parameter and for configuring the feature in the Tel Profiles table, see Configuring Tel Profiles.

Note: If the feature is configured for a specific Tel Profile, the settings of the global parameter is ignored for calls associated with the Tel Profile.

Enables the Aggressive NLP at the first 0.5 second of the call.

Note: For the parameter to take effect, a device restart is required.