User's Manual

Chapter 11 VoIP Testing
Specifying test settings
SmartClass TPS User’s Guide
90 22035456, Rev 001 May 2014
7 Press the right arrow to view the Stun Configs settings, and then specify the settings.
STUN (Simple Transversal of UDP [User Datagram Protocol] Through NATs [Network Address
Translators]) allows VoIP calls across a NAT router. These settings should only be changed if
necessary.
The following table describes the settings.
8 Press the right arrow to view the QOS Thresholds, and then specify the settings.
The quality of service (QoS) measurement uses two thresholds – good and poor – to produce
three quality ratings: good, poor, and fair. If the value is less than the good threshold, it is
considered good and is indicated with a check mark. A value between good and poor is
considered fair and is indicated by an exclamation mark. If the value is greater than the poor
threshold, it is considered poor and is indicated by an X.
The following table describes the settings.
The test settings are specified.
Setting Description
Stun Enable or disable.
Server Address Type Select IP Address or DNS Name.
Server IP Address If the Server Address Type is IP Address, enter the IP address of the stun
server.
Server Address If the Server Address Type is DNS Name, enter the DNS name of the stun
server.
Server Port Enter the port number of the stun server.
Client Port Enter the client port number.
Refresh Period Specify the NAT refresh rate. This is the number of seconds between mes-
sages to the STUN server to keep the NAT mapping alive.
NOTE:
If STUN is enabled, the network layer will not come up until the STUN client on the SmartClass
Triple Play Services has determined the type of NAT used between the SmartClass Triple Play
Services and the STUN server.
Setting Description
Jitter Good Enter the Pass threshold, in milliseconds.
Jitter Poor Enter the Fail threshold, in milliseconds.
Delay Good Enter the Pass threshold, in milliseconds.
Delay Poor Enter the Fail threshold, in milliseconds.
Loss Good Enter the Pass threshold, in milliseconds.
Loss Poor Enter the Fail threshold, in milliseconds.
MOS Scaling Select the scaling method. This selection affects the scaling of the CQ-MOS and
LQ-MOS results (on the “Call Scores” result screen). This selection is only avail-
able if your unit is equipped with the MOS option.