620/480, take the following procedures.

620/479

620/480

620/481

621/479

621/480

621/481

619/479

619/480

619/481

If the line port of gateway was locked, please use “hangup 0” command to release LINE 1, “hanhup 1” to release LINE 2…etc.

4.4 Adjust Input Tone Level

Sometimes the disconnect tone level is too low to be detected by VoIP FXO gateway. You can increase input gain from the following command.

voice -volume input xx commit

reboot

xxis the input gain parameters. The maximum number is 35. if the number is over 35, the echo may be happened. Once you increase input gain, the voice volume from PSTN to IP side is increased too.

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MicroNet Technology SP5054, SP5050, SP5052 user manual Adjust Input Tone Level