Voicemail messages have a lower playback volume than Cisco Unity system prompts

[TCC_2]

Core Issue

The signal is being boosted at the voice gateway or, for Cisco Unity versions without Automatic Gain Control (AGC), the Cisco Unity-CM TAPI service provider (TSP) wave gain playback and record settings are possibly set too low.

Resolution

To resolve this issue, perform these steps:

• If only outside callers are affected, check the voice gateway gain and attenuation levels. Refer to the the appropriate documentation for your configuration in Cisco Gateways for instructions on how to adjust attenuation and gain. For Cisco IOS  Software, use a positive dB value on the input gain command applied to the appropriate voice port to boost the signal if necessary.     
• If all calls are affected, perform these steps:     
  • For Cisco Unity version 3.0(x) and ealier, check the Cisco Unity-CM TSP wave gain playback and record the settings. For further information on how to adjust these settings, refer to the Cisco Unity-CM TSP Wave Gain Utility section of the Audio Quality chapter in Cisco Unity Troubleshooting Guide, Release 3.1(3).             
  • For Cisco Unity versions 3.1(1) and above, check and adjust the port-specific Cisco Unity AGC settings. See the Automatic Gain Control section of the Audio Quality chapter in Cisco Unity Troubleshooting Guide, Release .
     

For more information on volume distortion issues, refer to Audio Decision Tree for Cisco Unity.

Unity Version

Unity 2.x, Unity 3.x, Unity 4.x