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

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Configuring the fax protocol
Configuring the standard T.38 protocol
The standard T.38 protocol refers to the ITU-T T.38 protocol. It converts T.30-compliant fax signals to T.38
fax packets.
To configure the standard T.38 protocol:
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 standard
T.38 protocol.
fax protocol standard-t38
[ ls-redundancy number
[ hs-redundancy number ] ]
By default, the standard T.38
protocol is used.
You only need to configure this
command on the calling device, and
the called device automatically
matches the protocol configured on
the calling device.
Enabling CNG fax switchover
CNG fax switchover enables the device to switch to the fax mode after it receives a CNG from a fax
machine.
To enable CNG fax switchover:
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. Enable CNG fax switchover.
fax cng-switch enable
By default, CNG fax switchover is
disabled.
Enabling ECM
Error Correction Mode (ECM) allows fax machines to transmit fax packets as HDLC frames rather than
binary strings and to correct errors. The receiving fax machine requests the sending fax machine to
retransmit any HDLC frames it received with errors.
To use ECM, the receiving and sending fax machines must both support ECM.
To enable ECM: