H3C Technologies H3C MSR 50 - Manual (Page 628)

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Advanced settings configuration example
Configuring out-of-band DTMF transmission mode for SIP
Network requirements
Two routers work as SIP UAs. After establishing a call connection, the calling and called parties adopt
DTMF SIP out-of-band transmission to make the transmission of DTMF digits more reliable.
Figure 627 Network diagram
Configuration procedure
1. Configure voice basic calling settings.
For detailed configuration, see
Configuring direct calling for SIP UAs through the SIP protocol
(configuring static IP address) .
2. Configure out-of-band DTMF transmission mode for SIP.
# Configure the out-of-band DTMF transmission mode on Router A for the call route.
a. Select Voice Management > Call Route from the navigation tree, find call route 2222 in the list,
and click its icon
to access its advanced settings page.
b. Select Out-of-band Transmission for DTMF Transmission Mode.
c. Click Apply.
Figure 628 Configuring out-of-band DTMF transmission mode
# Configure out-of-band DTMF transmission mode on Router B for the local number.
a. Select Voice Management > Local Number from the navigation tree, find local number 2222
in the list, and click its icon
to access the advanced settings page.