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

140
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 ECM.
fax ecm
By default, ECM is disabled.
Use this command on both the calling
and called devices.
Configuring an NSF code for nonstandard capabilities
negotiation
Perform this task to match the nonstandard capabilities of the peer fax machine.
In common fax applications, fax machines negotiate with standard capabilities (such as V.17 and V.29)
by default and do not send each other nonstandard facilities (NSF) frames. In some cases, such as
encrypted fax, the fax machines exchange NSF frames to negotiate nonstandard capabilities.
To configure an NSF code for nonstandard capabilities negotiation:
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 an NSF code for
nonstandard capabilities
negotiation.
fax nsf value
By default, the NSF code is 000000.
The value 000000 specifies standard
capabilities negotiation.
Configuring the maximum fax rate for rate training
When rate training with the configured fax rate fails, the next lower supported rate is used until the rate
training succeeds.
If you specify the voice keyword, the maximum fax rate for rate training depends on the codec used:
• If G.711 is used, the maximum fax rate is 14400 bps, and the corresponding modem standard is
V.17.
• If G.723.1 Annex A is used, the maximum fax rate is 4800 bps, and the corresponding modem
standard is V.27.
• If G.726 is used, the maximum fax rate is 14400 bps, and the corresponding modem standard is
V.17.
• If G.729 is used, the maximum fax rate is 7200 bps, and the corresponding modem standard is
V.29.