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Mitel Forums => Mitel MiVoice Business/MCD/3300 => Topic started by: rhys.ci.hughes on December 17, 2018, 01:45:59 PM

Title: DTMF in MiVB 8 SP 3
Post by: rhys.ci.hughes on December 17, 2018, 01:45:59 PM

Hello all

I have searched the forum but I am wondering if anyone knows if The above MiVB supports inband DTMF over SIP?

We have a customer that receives calls from a Cisco Call Manager site and the DTMF seems to be inband. The Wireshark from the SIP SBC and MBG confirms this.

Also is it the MBG that handles all DTFM signalling and then passes that onto the MiVB and vice versa.

All outband sites work fine


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Title: Re: DTMF in MiVB 8 SP 3
Post by: Magpye on December 18, 2018, 03:56:24 AM

I don't believe Mitel supports In-band DTMF.

You could raise a DFR but this could take months to years to implement if it gets accepted.

Title: Re: DTMF in MiVB 8 SP 3
Post by: Magpye on December 18, 2018, 04:00:25 AM

Here is the DTMF extract from the Mitel Engineering Guidelines for version 9.0 SP1

Title: Re: DTMF in MiVB 8 SP 3
Post by: rhys.ci.hughes on December 19, 2018, 12:31:34 PM

Looks like we will probably be the 1000 person / company to put this request into Mitel. I can’t see much happening of this.
We are also speaking to SIP team to see if the SBC’s can manage this and send all signalling to Mitel systems with TE option. Hopefully this option will be quicker then waiting for Mitel to act


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