Our telephony devices and appliances, also the SIP Server use this TOS flags to prioritize SIP packages.
| Description | TOS (Dec) | TOS (Hex) | TOS (Bin) | TOS Precedence (Bin) | TOS Precedence (Dec) | TOS Precedence Name | TOS Delay flag | TOS Throughput flag | TOS Reliability flag | DSCP (Bin) | DSCP (Hex) | DSCP (Dec) | DSCP/PHB Class |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Signaling (SIP) | 96 | 0x60 | 01100000 | 011 | 3 | Flash | 0 | 0 | 0 | 011000 | 0x18 | 24 | cs3 |
| Audio (RTP) | 184 | 0xB8 | 10111000 | 101 | 5 | Critical | 1 | 1 | 0 | 101110 | 0x2E | 46 | ef |
| Video (RTP) * | 144 | 0x90 | 10010000 | 100 | 4 | FlashOverride | 1 | 0 | 0 | 100100 | 0x24 | 36 | af42 |
| * Cause many devices just can set one RTP value, it is recommended to set "96" for signaling and "184" for Audio & Video RTP transmission. This is also the settings we use on our systems. |
Grandstream devices
| Description | Value | |
|---|---|---|
| Layer 3 QoS for SIP | 24 | DSCP (Dec) |
| Layer 3 QoS for RTP | 46 | DSCP (Dec) |
VBOX/SBOX
| Description | Value | |
|---|---|---|
| SIP | 96 | TOS (Dec) |
| RTP/Audio | 184 | TOS (Dec) |
| RTP/Video | 184 | TOS (Dec) |