DTMF Problem :(

[hassan14233]

hi all

our manger wants to Trunk Updating Huwaii it Present Sip Trunk , ihave already use 2811 after 1 mounth everything working well FAX ,DID, DOD, DTMF

!!!! suddenly DTMF Down im checking with Huwaii Tech Support he said must be Configure

dial-peer voice 101 voip

destination-pattern [15]...

voice-class sip dtmf-relay force rtp-nte

session protocol sipv2

session target ipv4:10.10.10.2

dtmf-relay rtp-nte

codec g711ulaw

but when im try configure  DTMF yallow ican't find this mood

>>>>please what is way to configure this mood and what is the IOS Series and version support it >>

note my IOS is SP Services 12.4

thanks

[Daniele Giordano]

I found this command related to CME only.
IOS versions used in examples are 12.4(11)XJ or IOS 12.4(6th)T.

I've a question.
What type of DTMF relay are supported by your Huawei gateway?
The command "dtmf-relay rtp-nte" sets RFC2833.

Try with sip-notify also or use a combination of two:

dtmf-relay rtp-nte sip-notify

Cisco supports many methods:

voice-gateway(config-dial-peer)#dtmf-relay ?
  cisco-rtp          Cisco Proprietary RTP
  h245-alphanumeric  DTMF Relay via H245 Alphanumeric IE
  h245-signal        DTMF Relay via H245 Signal IE
  rtp-nte            RTP Named Telephone Event RFC 2833
  sip-kpml           DTMF Relay via KPML over SIP SUBCRIBE/NOTIFY
  sip-notify         DTMF Relay via SIP NOTIFY messages

RFC2833 method can be adjusted with these additional options:

voice-gateway(config-dial-peer)#dtmf-relay rtp-nte ?

digit-drop     Digits to be passed out-of-band and in-band digits dropped

voice-gateway(config-dial-peer)#dtmf-interworking ?
  rtp-nte  Digit-begin and digit-end events of RTP NTE packets are sent separately

[hassan14233]

thanks alot for your reply , i want to inform you the huwaii Support RFC-2833 DTMF

you can check the attachment

regards

[Daniele Giordano]

In the file attachment are present many SIP dial-peers and are configured all dtmf relay methods.

Try to remove h245-alphanumeric and h245-signal. This methods are used in H.323 dial-peers and are not supported by all SIP gateway.

Regards.

[hassan14233]

hi

im try to remove h245-alphanumeric h245-signal but still the same thing

so my Qustion there one guy in Huwaii told me configure this DTNF mode voice-class sip dtmf-relay force rtp-nte

please advise me

[Steven Holl · Accepted solution]

You don't need to force the RTP-NTE.  Just configure 'dtmf-relay rtp-nte' on the peers pointing this device.  You can omit all the h245 and sip notify stuff like a previous poster had mentioned.

And also add an incoming dial-peer, since you need to advertise RTP-NTE capabilities on a call in from that device to this one:

dial-peer voice 1117 voip
description incoming SIP peer
incoming called-number /
session protocol sipv2
session transport udp
dtmf-relay rtp-nte
codec g711alaw
no vad

If you still have issues after this, collect the following for a failure where DTMF was pressed mid-call:

debug voip ccapi inout

debug ccsip all

debug voip rtp session name

[hassan14233]

thanks alot

the problem has been solved

[Steven Holl · Accepted solution]

Regarding the dtmf-relay force command.  That's a hidden command.  It's only neccessary if the other side doesn't advertise rtp-nte.  Assuming your other peer is adverstising rtp-nte (which you can verify in the 'ccsip all' debug) you should be fine without it.

CSCek41147

CME does not offer RFC2833 back when it is configured on dial-peer

CSCsg30101
CME: dtmf-relay force rtp-nte CLI does not work