Synway Information Engineering Co., Ltd
SMG-D Series Analog Gateway User Manual (Version 2.0.0)
Page 19
NAT with firewall; can‟t detect over (fail to send detect message) and fail to detect
(No reply from the stun server).
STUN Server
Address
Address of the server for STUN traversal.
Mapping Contact IP
The IP filled in here will be used in the Contact field of the SIP message.
Mapping SDP IP
The IP filled in here will be used in the SDP field of the SIP message.
Rport
When this feature is enabled, a corresponding Rport field will be added to the Via
message of SIP. The default value is
enabled
.
Learn NAT
When this feature is enabled, the gateway will parse the corresponding address and
port in the message returned by Rport so as to use them for the following
communication. By default, this feature is
disabled
.
Note:
This feature gets valid only when Rport is enabled.
Auto Detect NAT IP
When this feature is enabled, the gateway will parse the corresponding address and
port in the message returned by Rport so as to use them for the following voice
communication. By default, this feature is
disabled
.
Note:
This feature gets valid only when Rport and Learn NAT are enabled.
RTP Self-adaption
When this feature is enabled, the RTP reception address or port carried by the
signaling message from the remote end, if not consistent with the actual state, will
be updated to the actual RTP reception address or port. By default, this feature is
disabled
.
3.4.6 Media
On the media settings interface you can configure the RTP port and payload type depending on
your requirements. After configuration, click
Save
to save your settings into the gateway or click
Reset
to restore the configurations. If a dialog box pops up after you save your settings asking
you to restart the system, do it immediately to apply the changes. Refer to
instructions. The table below explains the items shown on the interface.
Item
Description
DTMF Transmit
Mode
Sets the transmit mode for the IP channel to send DTMF signals. The optional
values are
RFC2833
,
In-band
and
Signaling
, with the default value of
RFC2833
.
RFC2833 Payload
Payload of the RFC2833 formatted DTMF signals on the IP channel. Range of
value: 90~127, with the default value of 101.
RTP Port Range
Supported RTP port range for the IP end to establish a call conversation, with the
lower limit of 2000 and the upper limit of 60000 and the difference between larger
than 480. The default value is 6000-10000.
JitterMode
Sets the mode for the Jitter buffer, with the default value of
Static Mode
.
JitterBuffer
Acceptable jitter for data packets transmission over IP, which indicates the buffering
capacity. A larger JitterBuffer means a higher jitter processing capability but as well
as an increased voice delay, while a smaller JitterBuffer means a lower jitter
processing capability but as well as a decreased voice delay. Range of value:
20~280, calculated by ms, with the default value of 100.
Note:
This is only valid if the Jitter Mode is set to Static Mode.
