New Forum system requires email address which you used to apply for your account to replace your original username. Password stays the same.Please see this post for more details

Yealink Test Club has been officially launched. Please visit post below to get detail information. Come and join us!

We just had the YMCS online and we are also working on the features plan on the future versions, in this regard we are need to hear your voice about the YMCS.
Please visit :

Post Reply 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
DTMF Tones & 3cx
Author Message Offline
Junior Member

Posts: 4
Joined: Dec 2014
Reputation: 0
Post: #1
DTMF Tones & 3cx
I have been having an issue sometimes where our phone system will not send out the correct DTMF tones. For example, if I call into a company and have to dial an extension, or call into a conf call and have to hit the conf call ID, it will skip/miss digits that I enter. This seems to be random, but a few companies we work with a lot have the same issue, so it is very annoying.

I am running T48 and T38 phones on 3cx 12.5. All phone have the same issue. I have attached snap shots of the transmission from wire shark. It appears that the DTMF signal is being sent 3 times for each 1 time I hit the button. When I call my cell phone and hit a button the DTMF tone come over all garbled and stutters.

T48 Firmware
T38 Firmware

Thanks in advance.

Attached File(s) Thumbnail(s)
06-30-2015 11:19 PM
Find all posts by this user    like0    dislike0 Quote this message in a reply
Post Reply 

Messages In This Thread
DTMF Tones & 3cx - - 06-30-2015 11:19 PM
RE: DTMF Tones & 3cx - tsukraw - 07-01-2015, 01:10 PM
RE: DTMF Tones & 3cx - Timeinspain - 11-24-2015, 12:42 AM
RE: DTMF Tones & 3cx - James_Yealink - 11-24-2015, 04:15 AM

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  T28P & T38G: Speed Dial delay or pause between DTMF yoda72 70 166,474 08-18-2019 09:06 PM
Last Post: HotlineExperts
  blf + dtmf key hercross 1 1,564 06-01-2018 02:22 AM
Last Post: Kevin_Yealink
  Yealink RFC4733 DTMF support avayax 0 1,409 03-30-2018 10:35 PM
Last Post: avayax
  Configure DTMF duration time on T23G avayablix 1 3,219 11-01-2016 02:52 AM
Last Post: Lucia_Yealink
  DTMF Tones to "Inband"? Bobcat19 1 3,803 07-21-2015 05:14 PM
Last Post: James_Yealink
  Ring Tones Charliestott 3 4,574 06-02-2015 06:49 AM
Last Post: John_K
  Do not detect inband DTMF aron 0 2,807 03-21-2015 05:38 AM
Last Post: aron
  DTMF timeout delay bazzacad 2 5,171 09-06-2014 12:23 AM
Last Post: bazzacad
  dtmf noise tone retiedintorni 6 9,247 10-29-2013 05:30 PM
Last Post: Yealink Support
  Possible to turn of DTMF tones while dialing? nestman 3 6,764 09-13-2013 06:24 PM
Last Post: andy123

Forum Jump:

User(s) browsing this thread: 1 Guest(s)

Contact Us   Yealink   Return to Top   Return to Content   Lite (Archive) Mode   RSS Syndication