DiffServ to ToS conversion table
This article describes how to convert Quality of Service (QoS) parameters to the ToS (Type of Services) format that is used by Biamp's VoIP-2 card. The table below shows DiffServ PHB and DiffServ DSCP codes, and converts them to the corresponding individual ToS parameters.
The DiffServ codes only code for certain Types of Services parameters: the Precedence, Min Delay, Max Throughput, and Max Reliability parameters for Layer 3 traffic only. The VoIP-2 card also allows the setting of Layer 2 User Priority and Layer 3 Min Cost parameters, which are not shown in the table below.
Conversion table
| DiffServ PHB | DiffServ DSCP | L3 Precedence | L3 Min Delay | L3 Max Throughput | L3 Max Reliability | |
|---|---|---|---|---|---|---|
| Default | 0 | 0 | Off | Off | Off | |
| CS1 | 8 | 1 | Off | Off | Off | |
| AF11 | 10 | 1 | Off | ON | Off | |
| AF12 | 12 | 1 | ON | Off | Off | |
| AF13 | 14 | 1 | ON | ON | Off | |
| CS2 | 16 | 2 | Off | Off | Off | |
| AF21 | 18 | 2 | Off | ON | Off | |
| AF22 | 20 | 2 | ON | Off | Off | |
| AF23 | 22 | 2 | ON | ON | Off | |
| CS3 | 24 | 3 | Off | Off | Off | |
| AF31 | 26 | 3 | Off | ON | Off | |
| AF32 | 28 | 3 | ON | Off | Off | |
| AF33 | 30 | 3 | ON | ON | Off | |
| CS4 | 32 | 4 | Off | Off | Off | |
| AF41 | 34 | 4 | Off | ON | Off | |
| AF42 | 36 | 4 | ON | Off | Off | |
| AF43 | 38 | 4 | ON | ON | Off | |
| CS5 | 40 | 5 | Off | Off | Off | |
| EF | 46 | 5 | ON | ON | Off | |
| CS6 | 48 | 6 | Off | Off | Off | |
| CS7 | 56 | 7 | Off | Off | Off |