R0106-HP MSR Router Series Voice Configuration Guide(V7)

141
If you specify the disable keyword, the fax function is disabled.
To configure the maximum fax rate for rate training:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter voice view.
voice-setup N/A
3. Enter dial program view.
dial-program N/A
4. Enter voice entity view.
entity entity-number { pots | voip } N/A
5. Configure the maximum fax
rate for rate training.
fax rate { 2400 | 4800 | 7200 |
9600 | 12000 | 14400 | disable
| voice }
By default, the maximum fax rate
for rate training depends on the
codec used.
Configuring a rate training mode
There are two training modes:
• Local training—The calling and called devices (gateways) participate in the rate training between
fax machines.
a. Rate training is performed between the fax machines and their respective gateways.
The fax machine sends a Training Check (TCF) message with a stream of 0s at the maximum
fax rate (configured by using the fax rate command) to its gateway. The gateway accepts the
rate if the received TCF message contains all 0s or the percentage of the number of 1s to the
total bits in the message is less than the set threshold. Otherwise, the fax machine uses the next
lower supported rate to send the TCF message for rate retraining until the rate training
succeeds.
b. The called device compares the training results and selects the lower rate.
• Point-to-point training—Rate training is performed between two fax machines.
To configure a rate training mode:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter voice view.
voice-setup N/A
3. Enter dial program view.
dial-program N/A
4. Enter voice entity view.
entity entity-number { pots | voip }
N/A
5. Configure a training mode.
• (Method 1) Configure
point-to-point training:
fax train-mode ppp
• (Method 2) Configure local
training:
a. Enable local training:
fax train-mode local
b. Set the threshold value:
fax local-train threshold
threshold
Use either method.
By default, point-to-point training is
used.