Cisco SPA301 User Manual

Configuring SIP, SPCP, and NAT
Configuring SIP
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 131
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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:
To configure SIP settings, navigate to Admin Login > advanced > Voice > Ext_n.
Under SIP Settings, configure the following fields:
Parameter Description
SIP ToS/DiffServ
Value
Time of service (ToS)/differentiated services (DiffServ) field
value in UDP IP packets carrying a SIP message. Defaults to
0x68.
SIP CoS Value [0-7] Class of service (CoS) value for SIP messages. Ranges from 0
to 7. Defaults to 3.
RTP ToS/DiffServ
Value
ToS/DiffServ field value in UDP IP packets carrying RTP data.
Defaults to 0xb8.
RTP CoS Value [0-7] CoS value for RTP data. Ranges from 0 to 7. Defaults to 6.
Network Jitter Level 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.
Jitter Buffer
Adjustment
How the jitter buffer is adjusted. Select: 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.

Cisco SPA301 Specifications

General

Brand	Cisco
Model	SPA301
Category	IP Phone
Language	English