Advanced Voice Fields
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Cisco Small Business WRP400 Administration Guide
95
A
Voice tab > Line page >
SIP Settings section
Network Jitter
Level
Determines how jitter buffer size is adjusted by the
WRP400. Jitter buffer size is adjusted dynamically. The
minimum jitter buffer size is 30 milliseconds or (10
millis 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
.
Jitter Buffer
Adjustment
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
.
Field
Description
SIP Transport
The TCP choice provides “guaranteed delivery”, which
assures that lost packets are retransmitted. TCP also
guarantees that the SIP packages are received in the same
order that they were sent. As a result, TCP overcomes the
main disadvantages of UDP. In addition, for security
reasons, most corporate firewalls block UDP ports. With
TCP, new ports do not need to be opened or packets
dropped, because TCP is already in use for basic activities
such as Internet browsing or e-commerce. Options are:
UDP
,
TCP
,
TLS
. The default is
UDP
.
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.
The default is
no
.
EXT SIP Port
The external SIP port number.