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dtmf-relay
dtmf-relay
To configure the router so it transmits Dual-Tone Multifrequency (DTMF) tones as out-of-band signals
during H.323 voice calls, use the dtmf-relay command in dial-peer voice configuration mode. To return
to the default configuration of transmitting DTMF tones as part of the voice traffic, use the no form of
this command.
Cisco uBR924, uBR925 cable access routers, Cisco CVA122 Cable Voice Adapter
Syntax Description
cisco-rtp
h245-alphanumeric
h245-signal
Defaults
By default, DTMF tones are transmitted inband, as part of the voice traffic.
Command Modes
Dial-peer voice configuration mode
Command History
Release
11.3(2)NA
12.0(2)XH
12.0(5)T
12.0(7)XK and
12.1(2)T
12.0(7)XR and 12.1(1)T Support was added for the Cisco uBR924 cable access router.
12.1(5)XU1
12.2(2)XA
Cisco Broadband Cable Command Reference Guide
6-44
dtmf-relay [cisco-rtp] [h245-alphanumeric] [h245-signal]
no dtmf-relay
(Optional) Forwards DTMF tones using the Real-Time Transport Protocol
(RTP) with a Cisco proprietary payload type.
Note
(Optional) Forwards DTMF tones using the H.245 Alphanumeric User
Input Indication method. This option transmits each tone using a fixed
duration of 500 milliseconds. Supports tones 0-9, *, #, and A-D.
(Optional) Forwards DTMF tones using the H.245 Signal User Input
Indication method. This option transmits each tone using the original
duration and supports tones 0-9, *, #, and A-D.
Modification
This command was introduced on the Cisco AS5300 universal access
server.
The cisco-rtp, h245-alphanumeric, and h245-signal keywords were
added.
This command was integrated into Cisco IOS Release 12.0(5)T.
Support was added for the MC3810 multiservice concentrator.
Support was added for the Cisco CVA122 Cable Voice Adapter.
Support was added for the Cisco uBR925 cable access router.
RTP is a proprietary Cisco protocol that interoperates only between
two Cisco access servers or routers running Cisco IOS images that
support the RTP protocol. The RTP protocol typically requires
Cisco IOS 12.0(5)T or later releases; see the router's release notes
for complete information.
Chapter 6
Cable CPE Commands
OL-1581-07
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