Dual Band Wireless VoIP Gateway
User’s Manual
33
FAX Detection Sensitivity
：
To set higher value to make VoIP Gateway to be more sensitive.
General Settings
→
FAX
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
,
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
N/A
Accept and change RTP to T.38
