【problem description】
The eLTE handset background noise of the group call is large.
【possible Cause】
1. The volume of the vehicle-mounted terminal is too large.
2. The cable connection quality is poor.
【Check Method】
1. Adjust the volume of the cab radio and observe the group call quality.
2. Use other connection lines and observe the group call quality.
【Recovery Method】
1. Adjust the volume of the small vehicle. If no, go to step 2.
2. Replace the cable connection and try again.
