Configuring Sip Settings For Extensions - Cisco 521SG - Unified IP Phone VoIP Administration Manual

Configuring SIP, SPCP, and NAT
Configuring SIP
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide

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
SIP ToS/DiffServ
Value
SIP CoS Value [0-7]
RTP ToS/DiffServ
Value
RTP CoS Value [0-7]
Network Jitter Level
Jitter Buffer
Adjustment
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
Time of service (ToS)/differentiated services (DiffServ) field
value in UDP IP packets carrying a SIP message. Defaults to
0x68.
Class of service (CoS) value for SIP messages. Ranges from 0
to 7. Defaults to 3.
ToS/DiffServ field value in UDP IP packets carrying RTP data.
Defaults to 0xb8.
CoS value for RTP data. Ranges from 0 to 7. Defaults to 6.
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.
How the jitter buffer is adjusted. Select: 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.
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