Installation guide

Troubleshooting 148
Synapse Installation Guide
Resolving PSTN Gateway Audio Echoes
The SB67010 PSTN Gateway uses automatic telephone line calibration to ensure optimal audio performance on outside calls. If
excessive echo occurs on outside calls consistently, observe the Gateway line calibration data to understand any telephone line
issues. Occasional echoes may be caused by the other person’s phone.
 To resolve audio echo issues:
1. Log in to the WebUI as administrator. Click Device Management, then Device Log in the Navigation Menu at left.
2. Select the PSTN Gateway from the drop-down list. Line Calibration Data appears as shown in Figure 156.
3. Check the loss numbers within the Line Calibration Data box for each telephone line on each Gateway. (A loss number
above 10 indicates good audio performance.)
Figure 156. Line Calibration Data