User`s manual

DVG-2016S/2032S User’s Manual Telephony Settings
D-Link Systems, Inc.
19
 FAX / Modem: Select the mode to detect if there is a fax tone and transfer the call to a fax line.
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(All the calls use T.30
codec of RTP stream, not
need to change codec.)
Accept and change RTP to T.38
T.38 Native Yes re-INVITE with T.38 Accept and change RTP to T.38
NOTE: When a fax tone is detected from the call, the gateway will automatically switch from
voice mode to fax mode. Hence, the fax settings will be temporarily applied to a specific port
which detects the fax tones, instead of its default voice settings.
 Ring (Early Media) Time Limit[10 - 600secs]：
：：
：The timeout to cancel a call when no one answers.
 Enable End of Digit Tone
：
：：
：
The gateway will play a “Beep-Beep” tone to notify that the call is in
progress.
 VoIP Calling Notification: The gateway will play a tone to notify that the call is via VoIP.
 Enable Built-in Call Hold Music: The default setting is that when receiving a call hold request, the
gateway will play music on hold. Untick the check box to disable this function while necessary.