D-Link DVG-5402G User Manual page 248

DVG-5402G/GF Wireless AC1200 MU-MIMO Dual Band
Gigabit Router with Fiber WAN Port, 3G/LTE Support, 2 FXS
Ports, and USB Port
User Manual
Parameter
Use Fax Passthrough
Use Modem
Passthrough
Payload type
Codec type
When all needed settings are configured, click the APPLY button.
Passthrough
Move the switch to the right to enable the Fax Passthrough
mechanism. Do not disable the mechanism unless your ISP requires
this.
Move the switch to the right to enable the Modem Passthrough
mechanism. Do not disable the mechanism unless your ISP requires
this.
Payload data type.
From the drop-down list, select a codec for data transfer.
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Configuring via Web-based Interface
Description