New Rock Technologies HX4E - SIP Configuration

User Manual MX Series Voice Gateway
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Figure 2-47 Media Stream Configuration Interface
Table 2-27 Media Stream Configuration Parameter
Name
Description
RTP port Min.
The lowest port number of UDP ports for RTP transmission and receiving. The parameter
must be greater than or equal to 3000. This is a required field.
Note: each phone call will occupy RTP and RTCP ports. If the gateway is equipped with 4
subscriber lines (or trunk line), then at least 8 UDP ports are needed.
RTP port Max.
The highest port number of UDP ports for RTP’s transmission and receiving.
This is a required field. The value must be greater than or equal to “2 × number of lines +
min. RPT port”.
SIP_TOS
For SIP signaling, set the service quality for different priorities. The default value is 0x00.
RTP_TOS
For RTP voice streams, set the service quality for different priorities. The default value is
0x0c.
Min. jitter buffer
RTP Jitter Buffer is constructed to reduce the influence brought by network jitter. This
parameter specifies the minimum number of RTP packets in the buffer. The default value
is 2 frames. The value range is 0 to 30 frames.
Max. jitter buffer
RTP Jitter Buffer is constructed to reduce the influence brought by network jitter. This
parameter specifies the maximum number of RTP packets allowed in the buffer. The
default value is 50 frames. The value range is 10 to 250 frames.
RTP drop SID
Select to discard received RTP SID voice packets. By default, SID voice packets will not
be dropped.
Note: RTP SID packets should be dropped only when they are in nonconformity to the
specifications. Nonstandard RTP SID data could generate noise for calls.
RTP obtaining
 From SDP global connection (default value): obtains the IP address from SDP global
connection;
 From SDP media connection: obtains the IP address from SDP Media Description.
2.7.9 SIP Configuration
SIP messages consist of request messages and response messages. Both include a SIP message-header
field and SIP message-body field. The SIP message header mainly describes the message sender and
receiver; SIP message body mainly describes the specific implementation method of the dialog.