VoIP profile configuration task list
581
SmartWare Software Configuration Guide
47 • VoIP profile configuration
Mode:
Profile VoIP
Procedure
: Configure fax relay (T.38)
Mode:
Profile VoIP
Step
Command
Purpose
1
node
(pf-voip)[
name
]#fax transmis-
sion bypass g711alaw64k
Adds fax bypass transmission with codec G.711
to the list of fax transmission modes.Alternative
codecs available are:
•
G.711uLaw
•
G.726 32kbps
•
G.726 24kbps.
2
optional
node
(pf-voip)[
name
]#fax dejitter-
max-delay
buffer-size
Sets the size of the dejitter buffer during fax trans-
missions. The operating mode of the dejitter buffer
is automatically set to fax optimized static-data
mode.
Patton recommends that you keep the size for fax
transmissions higher than that used for voice, since
fax is less sensitive to delay than packet loss.
The default value is 200ms which should be nomi-
nal for almost any transmission network. In excep-
tional cases it may be necessary to increase this
value (maximum 400ms).
Step
Command
Purpose
1
node
(pf-voip)[
name
]# fax transmis-
sion relay t38-udp
Adds fax relay transmission with T.38 protocol
over UDP to the list of fax transmission modes.
2
(optional)
node
(pf-voip)[
name
]#fax
redundancy ls
low-speed-redundancy
hs
high-speed-redundancy
Packet loss can be avoided by transmitting the fax
data packets several times. This can be configured
separately for low speed and the high speed traf-
fic. The default for both parameters is 0 (no redun-
dant transmission). Note that values greater than 0
provide more reliable transmissions, but consume
additional bandwidth.
3
(optional)
node
(pf-voip)[
name
]# fax dejitter-
max-delay
buffer-size
For proper operation, a dejitter buffer is used on
the receiver. The dejitter period can be set to com-
pensate for the jitter imposed by the network. The
default value is 200ms which should be nominal
for almost any transmission network. Only in
exceptional cases it may be necessary to increase
this value (maximum 400ms). The dejitter buffer,
by default, applies the operation mode ‘static-
data’, i.e. minimizes the packet loss.
Содержание SmartNode Series
Страница 250: ...RIP configuration task list 250 SmartWare Software Configuration Guide 23 RIP configuration rip enabled ...
Страница 635: ...635 Appendix A Terms and definitions Chapter contents Introduction 636 SmartWare architecture terms and definitions 636 ...
Страница 641: ...641 Appendix B Mode summary Chapter contents Introduction 642 ...
Страница 648: ...648 Appendix D Internetworking terms acronyms Chapter contents Abbreviations 649 ...
Страница 653: ...653 Appendix E Used IP ports available voice codecs Chapter contents Used IP ports 654 Available voice codecs 655 ...