H3C Technologies H3C MSR 5600 - Manual (Page 105)

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[RouterB-voice-dial] entity 2222 pots
[RouterB-voice-dial-entity2222] line 1/0
[RouterB-voice-dial-entity2222] match-template 2222
# Configure out-of-band DTMF for POTS entity 2222.
[RouterB-voice-dial-entity2222] outband sip
3. Verify the configuration.
Phones 1111 and 2222 can call each other and the routers use out-of-band signaling to transmit
DTMF tones.