[cisco-voip] In-band DTMF with Cisco Call Manager

[Wes Sisk]

Jim,

Very old 7960 phone loads generated the true DTMF tone when using 
speakerphone so that output of the speaker was picked up by the mic and 
the tone appeared inband.  We changed the speaker tone to be a generic 
"beep" instead of the true DTMF tone becuase some destinations were 
detecting doubld DTMF OOB and in band.

Other than this, I have never heard of the 7960 sending digits inband 
when using SCCP phone loads.  The SIP and MGCP phone loads for the 7960 
appear to have this option.

Can you clarify what model ipphones you are using?

/Wes

Jim Brunetti wrote:

>The problem is actually between my PSTN gateway and the CCM (I'm guessing). 
>The CCM is doing dtmf-relay which my gateway does not support.  The weird
>thing about all of this is that when we first set everything up, we were
>seeing inband DTMF from the phone/CCM and everything worked great.  A few days
>later it magically changed to H245 and no one knows why or how to switch it
>back.
>
>"Wes Sisk" <wsisk at cisco.com> wrote:
>
>  
>
>>AFAIK, It's not possible.  All dtmf events must be sent as SCCP events to
>>CCM for IPPhones.
>>
>>/Wes
>>
>>    
>>
>>>-----Original Message-----
>>>From: cisco-voip-bounces at puck.nether.net
>>>[mailto:cisco-voip-bounces at puck.nether.net]On Behalf Of Jim Brunetti
>>>Sent: Saturday, July 10, 2004 11:49 AM
>>>To: cisco-voip at puck.nether.net
>>>Subject: [cisco-voip] In-band DTMF with Cisco Call Manager
>>>
>>>
>>>
>>>Anyone know how to set DTMF signaling to be in-band using Call Manager
>>>3.3 and a 7960 IP phone? The phone is using Skinny to talk to the Call
>>>Manager.
>>>
>>>
>>>
>>>
>>>
>>>jim.brunetti at usa.net
>>>
>>>
>>>
>>>_______________________________________________
>>>cisco-voip mailing list
>>>cisco-voip at puck.nether.net
>>>https://puck.nether.net/mailman/listinfo/cisco-voip
>>>      
>>>
>>    
>>
>
>
>
>
>
>
>jim.brunetti at usa.net
>
>
>  
>
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