To reduce interference originating from your line, try:

• Disconnecting your line and calling back in.
• Switching from your mobile phone to a landline. Landlines offer better audio quality and sustained connectivity.
• Turning off speakerphone. Speakerphones can reduce call quality with echo, ambient and white noise.
• Picking up the telephone handset. Handsets usually have better sound qualities than speakerphones and headsets.
• Disconnecting hands-free devices.
• Moving electronic devices such as PDAs, mobile phones and laptops away from the active phone.