This Recommendation provides H.248 packages for different Quality of Service (QoS) support
mechanisms.
The QoS Class package (clause 6) defines a single property for signalling a QoS class codepoint.
Such a codepoint may be correlated with a set of network performance parameters. Such parameters
may be used in the area of transport resource management or admission control.
The Differentiated Service package (clause 7) defines a property to control the setting of the 6-bit
Differentiated Service (DS) field of the IP header, as defined in [IETF RFC 2474]. The Media
Gateway Controller (MGC) can set the Quality of Service (QoS) for egress media flows without
having to provision the Media Gateway (MG) with a default Differentiated Service Code Point
(DSCP) value.
Thus both packages have a slightly different scope as described in the sub-clauses below (see also
Appendix II).
The General IP Header QoS Octet package (clause 8) provides an extended capability, in
comparison to the Differentiated Service package, in order to address the entire 8-bit field, and
enable modification of individual bit values.
1.1 Typical application of the QoS Class package
1.2 Typical application of the Differentiated Services and General IP Header QoS Octet
packages
1.3 Avoidance of Interaction between the Differentiated Services and General IP Header
QoS Octet packages