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DVG-5008SG User’s Manual VoIP Gateway Configuration

D-Link Systems, Inc. 39

General Settings Ш FAX

Enable High Quality: Check the box to increase approximately two times the bandwidth in order to

compensate possible loss of packet during transmission and offers a better and reliable fax quality.

FAX Codec: Select G.711 a-law, G.711 u-law, or G.726 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.

Function Fax Detection Content of SDP of re-INVITE Receive re-INVITE with T.38

Disable No N/A Accept and change RTP to T.38

T.38 Fax Yes re-INVITE with T.38 and T.30 Accept and change RTP to T.38

T.30 Fax Yes re-INVITE with T.30 Accept and change RTP to T.38

T.30

Fax/Modem

Detect CED

only

re-INVITE with T.30 Accept and change RTP to T.38

T.30 Only No N/A Accept and change RTP to T.38

T.38 Native Yes re-INVITE with T.38 Accept and change RTP to T.38

T.30 V.152 Yes

There is no Re-Invite for T.30

Bypass mode

Accept and change RTP to T.38