Cisco 521SG Administration Guide - Page 295

Cisco SPA IP Phone Field Reference Ext Tab A Network Settings Parameter SIP TOS/DiffServ Value SIP CoS Value RTP TOS/DiffServ Value RTP CoS Value Network Jitter Level Jitter Buffer Adjustment Description TOS/DiffServ field value in UDP IP packets carrying a SIP message. Defaults to 0x68. CoS value for SIP messages. Defaults to 3. ToS/DiffServ field value in UDP IP packets carrying RTP data. Defaults to 0xb8. CoS value for RTP data. Defaults to 6. Determines how jitter buffer size is adjusted by the Cisco SPA9000. Jitter buffer size is adjusted dynamically. The minimum jitter buffer size is 30 milliseconds or (10 milliseconds + current RTP frame size), whichever is larger, for all jitter level settings. However, the starting jitter buffer size value is larger for higher jitter levels. This setting controls the rate at which the jitter buffer size is adjusted to reach the minimum. Select the appropriate setting: low, medium, high, very high, or extremely high. Defaults to high. Controls how the jitter buffer should be adjusted. Select the appropriate setting: up and down, up only, down only, or disable. Defaults to up and down. Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 294