When call-connected to the tenant and granted Call authorization opens the door 80% of the time?

The following could be the cause:

1. Line load balance issue: “ DTMF” sensitivity issue: go to “ advance folder” and adjust the DTMF sensitivity to “7” then test. If worst; then
2. Adjust DTMF sensitivity to “4”; if helped and now fewer calls issue still occurs; then
3. Call your provider to change out the line card ( load balance issue); or
4. Remove the DSL service from the line. The line MUST BE a POTS line.

Change telephone line demarcation point.