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Linksys SPA9x2 Phone Administration Guide Cisco Confidential--First Draft166
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SPA9x2 Phone Field Reference
SIP Settings
Network Jitter Level Determines how jitter buffer size is adjusted by the
SPA9x2. 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
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.
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.
Defaults to no.
EXT SIP Port The external SIP port number.
Auth Resync-Reboot If this feature is enabled, the SPA9x2 authenticates the
sender when it receives the NOTIFY resync reboot (RFC
2617) message. To use this feature, select yes. Otherwise,
select no.
Defaults to yes.
Parameter
Description