AltiGen MAXCS 7.0 Update 1 FXS Configuration with AudioCodes User Manual
Page 14

Configuring Analog Extensions with AudioCodes Gateways
Page 14 of 25
13.
Select VoIP > GW and IP to IP > DTMF and Supplementary > DTMF & Dialing.
Figure 19: Configure DTMF and dialing settings
14.
Select VoIP > GW and IP to IP > DTMF and Supplementary > Supplementary Services.
Figure 20: Disable hold, transfer, and call waiting
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If your MaxCS extension length is 3 digits, set Digit Mapping Rules to
911|##|[1-7]XX|#XX|9[2-9]XXXXXX|91[2-9]XXXXXXXXX|XX.T
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If your MaxCS extension length is 4 digits, set Digit Mapping Rules to
911|##|[1-7]XXX|#XX|9[2-9]XXXXXX|91[2-9]XXXXXXXXX|XX.T
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Set Declare RFC 2833 in SDP to Yes.
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Set 1st Tx DTMF Option to RFC 2833.
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Set RFC 2833 Payload Type to 101.
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Set Hook-Flash Option to INFO (NetCentrex).
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Set Enable Hold to Disable.
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Set Enable Transfer to Disable.
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Set Enable Call Waiting to Disable.