Cisco Small Business IP Phones

Step 1:
Access the SPA901 web-based setup page.

Step 2:
Click Admin Login then advanced.

Step 3:
Click Phone.

Step 4:
Scroll down and look for Audio Input Gain (dB). Set the Handset Input Gain to -6 or 6. Then click Submit All Changes.

Note: Check the sound quality on the phone to determine if it has improved. If this did not work, proceed to Step 6.

Step 5:
Click EXT 1. Look for Silence Supp Enable and set it to yes.

Note: If you are still encountering the same problem after these changes, reset the device to factory default and reconfigure it.