Cisco Cisco IOS Software Release 12.2(15)ZJ
SIP Gateway Enhancements
dtmf-relay (Voice over IP)
21
Cisco IOS Release 12.2(15)ZJ
dtmf-relay (Voice over IP)
To specify how an H.323 or Session Initiation Protocol (SIP) gateway relays dual tone multifrequency
(DTMF) tones between telephony interfaces and an IP network, use the dtmf-relay command in
dial-peer configuration mode. To remove all signaling options and send the DTMF tones as part of the
audio stream, use the no form of this command.
(DTMF) tones between telephony interfaces and an IP network, use the dtmf-relay command in
dial-peer configuration mode. To remove all signaling options and send the DTMF tones as part of the
audio stream, use the no form of this command.
dtmf-relay [cisco-rtp] [h245-alphanumeric] [h245-signal] [rtp-nte] [sip-notify]
no dtmf-relay [cisco-rtp] [h245-alphanumeric] [h245-signal] [rtp-nte] [sip-notify]
Syntax Description
Defaults
DTMF tones are disabled and sent inband. That is, they are left in the audio stream.
Command Modes
Dial-peer configuration
Command History
cisco-rtp
(Optional) Forwards DTMF tones by using Real-Time Transport Protocol
(RTP) with a Cisco proprietary payload type.
(RTP) with a Cisco proprietary payload type.
h245-alphanumeric
(Optional) Forwards DTMF tones by using the H.245 “alphanumeric” User
Input Indication method. Supports tones from 0 to 9, *, #, and from A to D.
Input Indication method. Supports tones from 0 to 9, *, #, and from A to D.
h245-signal
(Optional) Forwards DTMF tones by using the H.245 “signal” User Input
Indication method. Supports tones are from 0 to 9, *, #, and from A to D.
Indication method. Supports tones are from 0 to 9, *, #, and from A to D.
rtp-nte
(Optional) Forwards DTMF tones by using Real-Time Transport Protocol
(RTP) with the Named Telephone Event (NTE) payload type.
(RTP) with the Named Telephone Event (NTE) payload type.
sip-notify
(Optional) Forwards DTMF tones using SIP NOTIFY messages.
Release
Modification
11.3(2)NA
This command was introduced on the Cisco AS5300.
12.0(2)XH
The cisco-rtp, h245-alphanumeric, and h245-signal keywords were added.
12.0(5)T
This command was integrated into Cisco IOS Release 12.0(5)T.
12.0(7)XK
This command was first supported for VoIP on the Cisco MC3810.
12.1(2)T
Changes made in Cisco IOS Release 12.0(7)XK were integrated into Cisco IOS
Release 12.1(2)T.
Release 12.1(2)T.
12.2(8)T
This command was implemented on the Cisco 1751, Cisco 2600 series and
Cisco 3600 series, Cisco 3725, and Cisco 3745.
Cisco 3600 series, Cisco 3725, and Cisco 3745.
12.1(5)XM2
This command was implemented on the Cisco AS5350 and Cisco AS5400.
12.2(4)T
This command does not support the Cisco AS5300, Cisco AS5350, and
Cisco AS5400 in this release.
Cisco AS5400 in this release.
12.2(2)XB1
This command was implemented on the Cisco AS5850.
12.2(11)T
This command was integrated into Cisco IOS Release 12.2(11)T.
12.2(15)ZJ
The sip-notify keyword was added.