Cisco SPA2102-SF Administration Guide - Page 201

ATA Voice Field Reference PSTN Line page (SPA3102) B Network Jitter Level Jitter Buffer Adjustment Determines how jitter buffer size is adjusted by the ATA device. 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. The default is high. Controls how the jitter buffer should be adjusted. Select the appropriate setting: up and down, up only, down only, or disable. The default is up and down. Voice tab > PSTN Line page (SPA3102) > SIP Settings section SIP Port Port number of the SIP message listening and transmission port. The default is 5060. SIP 100REL Enable 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. EXT SIP Port Auth ResyncReboot The default is no. The external SIP port number. If this feature is enabled, the ATA device authenticates the sender when it receives the NOTIFY resync reboot (RFC 2617) message. To use this feature, select yes. Otherwise, select no. SIP Proxy-Require The default is yes. The SIP proxy can support a specific extension or behavior when it sees this header from the user agent. If this field is configured and the proxy does not support it, it responds with the message, unsupported. Enter the appropriate header in the field provided. Cisco Small Business ATA Administration Guide 201