HX4E/MX8A Series Voice Gateway User Manual
New Rock Technologies, Inc. 59
Table 2-26 Media Stream Configuration Parameter
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.
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”. The value must be greater than or equal to “2 × number of
lines + min. RPT port”.
For SIP signaling, set the service level quality guarantee for different priorities.
The default value is 0x00.
For RTP voice streams, set the service level quality guarantee for different
priorities. The default value is 0x0c.
RTP Jitter Buffer is constructed to reduce the influence brought by network jitter.
This default value is 3.
RTP Jitter Buffer helps to reduce the influence brought by network jitter. The
default value is 50.
Determine whether 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.
From SDP global connection (default value): obtain the IP address from SDP
global connection;
From SDP media connection: obtain the IP address from SDP Media
Description.
2.7.7 SIP Related Configuration
SIP messages consist of request message and response message. 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.
Message of request: the SIP message sent by a client to the server, for the purpose of activating the given
operation, including INVITE, ACK, BYE, CANCEL, OPTION and UPDATE etc.
Message of response: the SIP message sent by a server to the client as response to the request, including
1xx, 2xx, 3xx, 4xx, 5xx, and 6xx responses.
Message header: Call-ID.
Parameter line: Via, From, To, Contact, Csq, Content-length, Max-forward, Content-type, White Space,
and SDP etc.
MX gateways provide good flexibility in content setting in order to improve compatibility with the SIP
register server.
After login, click the label of Advanced > SIP to open this interface.