Quality of Service for VoIP Traffic Overview
This topic describes how to use DSCP code points to optimize service for VoIP traffic.
To ensure optimized quality conditions for VoIP traffic, in gate open requests, the gateway controller can include a request for the BGF to mark voice traffic with various DSCP code points. The pgcpd process passes this information to the MultiServices PICs or MS-DPCs, which then apply these actions to the gate.
You can configure a default DSCP value that the virtual BGF uses for outgoing traffic when the DSCP value is not defined by the gateway controller. If you do not configure a value, the default value is 0x00. All eight bits are exposed, but the packet uses only the six leading bits. You can embed other data in the other two bits.
The DiffServ package is defined in Annex A.2 of Gateway control protocol v3, ITU-T Recommendation H.248.1, September 2005.
