Cisco SPA525G Administration Guide - Page 104

5 Configuring SIP, SPCP, and NAT Configuring SIP Parameter Description RTP CoS Value [0-7] CoS value for RTP data. Defaults to 6. Network Jitter Level Determines how jitter buffer size is adjusted by the 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. Jitter Buffer Adjustment 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. STEP 5 Under SIP Settings, configure the following fields: Parameter SIP Transport SIP Port SIP 100REL Enable EXT SIP Port Description Select from UDP, TCP, or TLS. Defaults to UDP. Port number of the SIP message listening and transmission port. Defaults to 5060. To enable the support of 100REL SIP extension for reliable transmission of provisional responses (18x) and use of PRACK requests, select yes. Otherwise, select no. Defaults to no. The external SIP port number. 102 Cisco SPA and Wireless IP Phone Administration Guide