Fax Train-Mode - H3C MSR 20-20 Command Reference Manual

2688 C 176: F
HAPTER AX OVER
Example

fax train-mode

Syntax
View
Parameter
Description
Example
IP C C
ONFIGURATION OMMANDS
Increasing the number of redundant packets will improve reliability of network
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transmission and reduce packet loss ratio. A great amount of redundant
packets, however, can increase bandwidth consumption to a great extent and
thereby, in the case of low bandwidth, affect the fax quality seriously.
Therefore, the number of redundant packets should be selected properly
according to the network bandwidth.
The passthrough mode is subject to such factors as loss of packet, jitter and
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delay, so the clock on both communication sides must be kept synchronized. At
present, only G.711 A-law and G.711 m-law are supported, and the voice
activity detection (VAD) function should be disabled.
# Set to 2 the number of high-speed redundant packets sent via the T.38 fax
protocol.
<Sysname> system-view
[Sysname] voice-setup
[Sysname-voice] dial-program
[Sysname-voice-dial] entity 4 pots
[Sysname-voice-dial-entity4] fax protocol t38 hb-redundancy 2
fax train-mode { local | ppp }
undo fax train-mode
POTS/VoIP/VoFR entity view
local: Adopts the local training mode.
ppp: Adopts the point-to-point protocol (ppp) training mode.
Use the
fax train-mode
Use the
undo fax train-mode
By default, the PPP training mode is adopted.
n
VoFR entities only support the PPP training mode.
# Configure the local training mode for the gateway.
<Sysname> system-view
[Sysname] voice-setup
[Sysname-voice] dial-program
[Sysname-voice-dial] entity 10 pots
[Sysname-voice-dial-entity10] fax train-mode local
command to configure the fax training mode.
command to restore the default.