Cisco 521SG Administration Guide - Page 115
Configuring SIP Settings for Extensions, Admin Login, advanced, Voice, Ext_n.
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Configuring SIP, SPCP, and NAT Configuring SIP 4 Configuring SIP Settings for Extensions To configure the network settings for SIP extensions, navigate to Admin Login > advanced > Voice > Ext_n. Under Network Settings, configure the following fields: Parameter Description SIP ToS/DiffServ Value Time of service (ToS)/differentiated services (DiffServ) field value in UDP IP packets carrying a SIP message. Defaults to 0x68. SIP CoS Value [0-7] Class of service (CoS) value for SIP messages. Ranges from 0 to 7. Defaults to 3. RTP ToS/DiffServ Value ToS/DiffServ field value in UDP IP packets carrying RTP data. Defaults to 0xb8. RTP CoS Value [0-7] CoS value for RTP data. Ranges from 0 to 7. Defaults to 6. Network Jitter Level The jitter buffer size as it is adjusted by a device. Jitter buffer size is adjusted dynamically. The minimum jitter buffer size is 30 milliseconds or (10 milliseconds plus the 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 milliseconds. Select: low (30 ms), medium (40 ms), high (60 ms), very high (80 ms), or extremely high (180 ms). Defaults to high. Jitter Buffer Adjustment How the jitter buffer is adjusted. Select: up and down, up only, down only, or disable. Defaults to up and down. To configure SIP settings, navigate to Admin Login > advanced > Voice > Ext_n. Under SIP Settings, configure the following fields: Parameter SIP Transport 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. Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 114