Command Reference Guide

200 ● outband 3Com Router 5000 Family and Router 6000 Family
Command Reference
outband
Purpose Use the outband command to configure transmission of DTMF code in the outband
mode.
Use the undo outband command to restore transmission of DTMF code to inband
mode.
Syntax outband { h225 | h245 | sip }
undo outband
Parameters h225
Enables DTMF H.225 out-of-band transmission.
h245
Enables DTMF H.245 out-of-band transmission.
sip
Enables DTMF SIP out-of-band transmission.
Default By default, the inband transmission mode is adopted.
Example Configure DTMF code outband transmission in the fast connect mode for VoIP voice
entity 10.
[Router-voice-dial-entity10] fast-connect
[Router-voice-dial-entity10] outband h245
View This command can be used in the following views:
■ Voice Entity view
Description Adopting normal connect mode, DTMF code can be directly transmitted through
H.245 or H.225 protocol. Adopting fast connect mode, the DTMF code can only be
transmitted in outband.
Once transmitting DTMF code in outband mode has been configured for
NON-STANDARD router, in order to confirm whether or not the peer gateway can
accept such transmission mode of DTMF, the ability negotiation must be fulfilled after
the connection is established. Currently, 3Com series routers only reactively accept
transparent transmission ability negotiation of DTMF code. In no case will it actively
initiate the negotiation process mentioned above.
In order to transparently transmit DTMF code, it is demanded, during actual
application, to configure this command for VoIP voice entity on the calling gateway
and also for POTS voice entity for the called gateway.