Configuring and Managing E1 Digital Line Cards 191Modifying E1 Span Audio ControlsAudio Controls settings affect individual spans. You can edit theseproperties:■ Silence Suppression (3C10165D only) — Enables you to override thesystem-wide setting. For a detailed description of how silencesuppression affects audio quality and bandwidth, see “AudioSettings” on page 257.■ Audio Compression (3C10165D only) — Enables you to override thesystem-wide setting. For a detailed description of how audiocompression affects audio quality and bandwidth, see “AudioSettings” on page 257.■ Audio Source Gain — Enables you to adjust the audio gain to resolvevolume issues.CAUTION: Do not change your Audio Source Gain settings unless youare instructed to do so by a support representative.To modify E1 span audio controls:1 On the Digital Line Cards tab, select ISDN PRI Span List from the SelectDevice Type drop-down list.2 Click Apply.3 Select the span you want to modify from the Span List. The number ofchannels supported per span depends on the configuration of the DigitalLine Card. E1 cards support 30 channels per span.4 Click Audio Controls. Click the Help button for more information aboutdialog box fields.Adding or Modifyingan E1 GroupA digital line card group is one or more E1channels that are assigned thesame characteristics, such as Channel Protocol. This section describeshow to perform these actions:■ Adding an E1 Group■ Modifying an E1 Group■ Changing E1 Group Membership■ Removing an E1 GroupCAUTION: Modifying an E1 group disconnects any calls in process onany channels associated with the group.
