Sip Settings - Linksys SPA 900 Series Administration Manual

Ext Tab
Field
SIP TOS/DiffServ Value
SIP CoS Value
RTP TOS/DiffServ Value
RTP CoS Value
Network Jitter Level
Jitter Buffer Adjustment

SIP Settings

Note Some of the parameters in this section do not apply to the WIP310 wireless phone. Only the SIP Port
and SIP Debug Option parameters apply to the SPA901.
Field
SIP Transport
SIP Port
SIP 100REL Enable
EXT SIP Port
Linksys IP Phone Administrator Guide
5-38
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 Linksys 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.
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.
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.
Chapter 5 Linksys IP Phone Field Reference
Firmware Version 5.1