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Chapter 6: Using the Web-based Utility
The Voice Tab
IP Telephony System
The Voice - FXS 1/2 Screen
Use the appropriate screen to configure settings for each FXS port, which is called the Phone port on the System.
Line Enable. To enable this line for service, select yes. Otherwise, select no. The default is yes.
Network Settings
SIP ToS/DiffServ Value. Enter the TOS/DiffServ field value in UDP IP packets carrying a SIP message. The default
is 0x68.
SIP CoS Value. Enter the CoS value for SIP messages. The default is 3.
RTP ToS/DiffServ Value. Enter the ToS/DiffServ field value in UDP IP packets carrying RTP data. The default is
0xb8.
RTP CoS Value. Enter the CoS value for RTP data. The default is 6.
Network Jitter Level. This setting determines how jitter buffer size is adjusted by the System. 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. The default is high.
Jitter Buffer Adjustment. This 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.
SIP Settings
SIP Port. Enter the port number of the SIP message listening and transmission port. The default is 5080.
SIP Remote-Party-ID. To use the Remote-Party-ID header instead of the From header, select yes. Otherwise,
select no. The default is yes.
SIP Debug Option. SIP messages are received at or sent from the proxy listen port. This feature controls which
SIP messages to log. Select none for no logging. Select 1-line to log the start-line only for all messages. Select
1-line excl. OPT to log the start-line only for all messages except OPTIONS requests/responses. Select 1-line
IMPORTANT: In most cases, you should not change the service settings unless instructed to do
by your ITSP.
Figure 6-36: Voice - FXS 1 Screen - Network Settings
Figure 6-37: Voice - FXS 1 Screen - SIP Settings
VoIPon Solutions www.voipon.co.uk sales@voipon.co.uk Tel: +44 (0) 1245 600560