MicroNet Technology SP5101 - Manual (Page 82)

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tone, rbt: ring back tone, bt: busy tone, dt: dial tone). This
parameter should be accompanied with tone type.
2. -ring: To set RING tone value. The played tone type, when
Phone ha incoming call.
3. -rbt: To set Ring Back Tone value. The played tone type, when
Phone dials out a call.
4. -bt:
To set Busy Tone value. The played tone type, when Phone
dials to a destination that is busy.
5. -dt:
To set Dial Tone value. The played tone type, when hook off
the Phone.
6.18 [tos] command
TOS/DiffServ (DS) priority function can discriminate the Differentiated Service
Code Point (DSCP) of the DS field in the IP packet header, and map each
Code Point to a corresponding egress traffic priority. As per the definition in
RFC2474, the DS field is Type-of-Service (TOS) octet in IPv4. The
recommended DiffServ Code Point is defined in RFC2597 to classify the traffic
into different service classes. The mapping of Code Point value of DS-field to
egress traffic priorities is shown as follows.