Cisco SPA IP Phone Field Reference
Ext Tab
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 297
B
SIP Settings
RTP TOS/DiffServ Value ToS/DiffServ field value in UDP IP packets carrying
RTP data.
Defaults to 0xb8.
RTP CoS Value CoS value for RTP data.
Defaults to 6.
Network Jitter Level Determines how jitter buffer size is adjusted by the IP
phone. 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.
Parameter Description
Parameter Description
SIP Transport Select from UDP, TCP, or TLS.
Defaults to UDP.
SIP Port Port number of the SIP message listening and
transmission port.
Defaults to 5060.
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