DVG-N5412SP User’s Manual                                     ADVANCED 
D-Link Systems, Inc.                62 
ADVANCED  → VoIP → FAX  
 
 
Switch FAX On CED Detection: DVG will send FAX Re-Invite immediately as it detect FAX CED tone, that 
will save handshaking time between FAX machines. 
Restrict T.38: DVG will reject T.38 Re-invite in case the FAX type contains without T.38. 
FAX Detection Sensitivity: To set higher value to make DVG to be more sensitive. 
High Speed Redundancy: Set redundancy packets for FAX image. It could repair FAX image for 
non-continuous packets lost. The higher redundancy the higher bandwidth required. 
Low Speed Redundancy: Set redundancy packets for FAX handshaking signaling. 
FAX Codec: Select G.711 a-law or G.711 u-law for T.30 from the drop-down menu.   
T.30 Bypass Payload Type: Fill correct payload type of T.30 bypass method. 
FAX Jitter Buffer: Enter the buffer or jitter when receiving packets.   
Note: When you send a fax over an IP network, the IP network needs to support fax over IP 
functionality (either T.38 or T.30). Please consult your VoIP Service Provider for this setting.