Chapter 9 The VoIP General Screens
BM2022 Users Guide
150
9.3 QoS
This section describes the features of the Quality of Service (QoS) screen.
Click
VoIP > General > QoS
to set up Type of Service (ToS) and Differentiated Services (Diffserv)
settings for voice traffic transmission through the BM2022.
Figure 75
VoIP > General > QoS
The following table describes the labels in this screen.
Voice Jitter Buffer
Type
Voice jitter is a variation in delay of RTP packets delivery. This could cause
strange sound effects. The BM2022 can utilize the following types of jitter buffer
to minimize the effects of jitter.
Dynamic
- Jitter buffer size is dynamically changed by RTP packets delivery
status.
Static
- Jitter buffer size is fixed.
Voice Jitter Buffer
Length
Select the maximum number of milliseconds of voice traffic the BM2022 can help
to smooth out the jitter in order to ensure good voice quality for your
conversations.
Packet Loss
Concealment
Packets may be dropped due to an overwhelming amount of traffic on the
network. Some degree of packet loss will not be noticeable to the end user, but
as packet loss increases the quality of sound degrades. Select this to have the
BM2022 to improve the voice quality when packet loss occurs.
T.38 Static Jitter
Length
T.38 is an ITU-T standard that VoIP devices use to send fax messages over the
Internet.
Select the number of milliseconds for the jitter buffer size used for transmitting
T.38 fax messages.
Table 62
VoIP > General > Media (continued)
LABEL
DESCRIPTION
Table 63
VoIP > General > QoS
LABEL
DESCRIPTION
SIP ToS/DiffServ
Enter the DSCP value you want to mark on all outgoing SIP packets generated by
the BM2022 for DiffServ-enabled networks. Since DiffServ uses the first 6 bits of
the 8-bit IP ToS field to represent the DSCP value, enter here the 6-bit DSCP
value you want to mark in hexadecimal (in a format of 0x00), and the BM2022
will then automatically append 2 bits '0' to make a whole 8-bit ToS field value for
all outgoing SIP packets.
For example, if you enter 0x2E, it is 101110 in binary for DSCP. The BM2022
converts it to 10111000 in binary and marks on the IP ToS field of all the
outgoing SIP packets.
RTP ToS/DiffServ
Enter the DSCP value you want to mark on all outgoing VoIP data packets
(including both RTP and T.38 UDPTL packets) generated by the BM2022 for
DiffServ-enabled networks.
Содержание BM2022
Страница 12: ...15 PART I User s Guide ...
Страница 22: ...Chapter 2 Introducing the Web Configurator BM2022 User s Guide 26 ...
Страница 55: ...59 PART II Technical Reference ...
Страница 56: ...60 ...
Страница 60: ...Chapter 5 System Status BM2022 User s Guide 64 ...
Страница 86: ...Chapter 6 WiMAX BM2022 User s Guide 90 ...
Страница 187: ...Chapter 12 Maintenance BM2022 User s Guide 192 ...
Страница 193: ...Chapter 13 Troubleshooting BM2022 User s Guide 198 ...
Страница 203: ...Appendix A WiMAX Security BM2022 User s Guide 208 ...
Страница 237: ...Appendix C Pop up Windows JavaScript and Java Permissions BM2022 User s Guide 242 ...
Страница 273: ...Appendix E Importing Certificates BM2022 User s Guide 278 ...