HPE FlexFabric 5700 Series Network Management And Monitoring Configuration Manual page 130

G.729 A-law.
2. The destination device takes a time stamp to each voice packet it receives and sends it back to
the source.
3. Upon receiving the packet, the source device calculates the jitter and one-way delay based on
the time stamp.
The following parameters that reflect VoIP network performance can be calculated by using the
metrics gathered by the voice operation:
•
Calculated Planning Impairment Factor (ICPIF)—Measures impairment to voice quality in a
VoIP network. It is decided by packet loss and delay. A higher value represents a lower service
quality.
•
Mean Opinion Scores (MOS)—A MOS value can be evaluated by using the ICPIF value, in the
range of 1 to 5. A higher value represents a higher service quality.
The evaluation of voice quality depends on users' tolerance for voice quality. For users with higher
tolerance for voice quality, use the advantage-factor command to configure the advantage factor.
When the system calculates the ICPIF value, it subtracts the advantage factor to modify ICPIF and
MOS values for voice quality evaluation.
The voice operation requires both the NQA server and the NQA client. Before you perform a voice
operation, configure a UDP listening service on the NQA server. For more information about UDP
listening service configuration, see
The voice operation cannot repeat.
To configure the voice operation:
Step
1. Enter system view.
2. Create an NQA operation
and enter NQA operation
view.
3. Specify the voice type and
enter its view.
4. Specify the destination
address of voice packets.
5. Specify the destination port
of voice packets.
6. (Optional.) Specify the codec
type.
7. (Optional.) Specify the
advantage factor for
calculating MOS and ICPIF
values.
8. (Optional.) Specify the
source IP address of voice
packets.
"Configuring the NQA
Command
system-view
nqa entry admin-name
operation-tag
type voice
destination ip ip-address
destination port port-number
codec-type { g711a | g711u |
g729a }
advantage-factor factor
source ip ip-address
121
server."
Remarks
N/A
By default, no NQA operation is
created.
N/A
By default, no destination IP
address is configured.
The destination IP address must be
the same as the IP address of the
listening service on the NQA server.
By default, no destination port
number is configured.
The destination port number must
be the same as the port number of
the listening service on the NQA
server.
By default, the codec type is G.711
A-law.
By default, the advantage factor is 0.
By default, no source IP address is
specified.
The source IP address must be the
IP address of a local interface, and
the interface must be up. Otherwise,