Figure 6: Method 2 - Configure Fxo Port On The Gxw410X: Dtmf Method; Figure 7: Method 2 - Configure Fxo Port On The Gxw410X: Dtmf Payload Type; Figure 8: Method 2 - Configure Fxo Port On The Gxw410X: Fxo Termination - Grandstream Networks UCM6100 Series Configuring

Figure 6: Method 2 - Configure FXO Port on the GXW410X: DTMF Method

Since we are going to use IVR when the call is forwarded to the UCM6100, the UCM6100 will need to be
able to detect the DTMF digits. Configure the GXW410X FXO port DTMF settings as below for the initial
setup. This can be found under SETTINGS  CHANNEL SETTINGS

Figure 7: Method 2 - Configure FXO Port on the GXW410X: DTMF Payload Type

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Set the DTMF Payload Type to 101. This value can be found under SETTINGS  CALL
SETTINGS
There are a few necessary changes to be made in FXO termination section. This can be found in the FXO
LINES settings page.

Figure 8: Method 2 - Configure FXO Port on the GXW410X: FXO Termination

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First we should confirm which method the PSTN line is using. If the PSTN line is using current
disconnect (typical case in North America), then we should turn on "Enable Current Disconnect" and
disable "Enable PSTN Disconnect Tone Detection".
The default "Current Disconnect Threshold" is 100ms, but if you start experiencing dropped calls then
you should raise this value by 100ms intervals.
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If the PSTN disconnects using the tones method, then turn on "Enable PSTN Disconnect Tone
Firmware Version 1.4.1.4 Configuring UCM6100 Series with GXW410X Page 7 of 18