R2511-HP MSR Router Series Voice Configuration Guide(V5)

278
Ste
p
Command Remarks
5. Configure the signal
transmission mode of fax
faculty.
fax nsf-on
By default, a standard faculty mode is
adopted for fax faculty transmission.
Configuring maximum fax rate
You can configure the maximum fax rate according to the fax protocols. If the baud rate is set to a value
other than disable and voice, the configured value is adopted as the allowed maximum fax rate.
If voice mode is adopted, the allowed maximum fax rate is determined first in accordance with voice
coding/decoding protocols.
• If G.711 is used, the fax rate is 14,400 bps and the corresponding fax protocol is V.17.
• If G.723.1 Annex A is used, the fax rate is 4800 bps and the corresponding fax protocol is V.27.
• If G.726 is adopted, the fax rate is 14,400 bps and the corresponding fax protocol is V.17.
• If G.729 is used, the fax rate is 7200 bps and the corresponding fax protocol is V.29.
If the fax rate is set to "disable", the fax function is disabled.
Configuration prerequisites
VoIP configuration is completed, IP calls can be made successfully, and fax machines are connected
correctly.
Configuration procedure
To configure the fax rate:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter voice view.
voice-setup N/A
3. Enter voice dial program
view.
dial-program N/A
4. Enter voice entity view.
entity entity-number { pots | voip }
N/A
5. Configure the allowed
maximum fax rate.
fax baudrate { 2400 | 4800 |
9600 | 14400 | disable | voice }
By default, the voice mode is first
used to determine the fax rate.
Note that when the disable
keyword is provided, if the call
control protocol is SIP, private T.38
and standard T.38 faxes are
disabled.
Configuring fax training mode
There are two fax training modes: local training and point-to-point training.
• Local training—The gateways participate in the rate training between fax terminals. In the local
training mode, rate training is performed between fax terminals and gateways respectively, and
then the receiving gateway sends the training result of the receiving fax terminal to the transmitting