Log In

Come Join Us!

Are you a
Computer / IT professional?
Join Tek-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Tek-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


DTMF not working

DTMF not working

DTMF not working

IP Office Rel. 11

Hi all,

Brand new install in December 2018. They use 9508 handsets. The client has called in twice to report that button presses are not registering.

When I first went in and tested digit I pressed registered fine. Not one was skipped. I told them to monitor it and take notes on whats happening when the issue happens eg, time of day, what number they are dialing, which extension etc etc.

They called back a few days later. On the second visit, I witnessed the problem. Lets say I dial an 11 digit number. when I get to digit 4 or 5, they skip and do not register on the screen and then it will pick back up on digit 7 or 8 and register the remaining digits. Based on the client, they have the same issue when dialing 7 digit numbers as well.

What makes it strange is that it doesn't happen all the time. It's intermittent. Out of 15 calls maybe 2 of the numbers don't register properly. They have noticed it across all phones in the office.

Is their any suggestions to try and resolve this issue. I compared the line programming with multiple other clients configs and they are identical.


RE: DTMF not working

This is not a DTMF issue, but a dialling issue.

Make sure the dial time-out is set to a proper value (4 seconds) or better make a good call list in the ARS based on digits needed to make the call.




RE: DTMF not working

Thanks Okkie26.

The Dial Delay Timer was set to 1 sec. I changed that to 4 secs.

Below are the entries under the ARS. Most are the default entries.

Code Tel# Feature Line Group ID
11 911 Dial Emerg 9
911 911 Dial Emerg 9
0N 0N Dial 9
XN N Dial 9

I made the change on Friday and had the customer monitor. They emailed to say to noticeable change. Digit are still being dropped.

Any other suggestions? Or, how can I make the ARS entries more specific?


RE: DTMF not working

I can't tell because I don't know the numberplans in your area.

I can help you if you have to make a numberplan in the Netherlands though.

But what you could do is try to enter each function code with a semicolon ;

So that would be

XXXXXXXXXXN; - Dial - . - 9

RE: DTMF not working

We use 7 digit dialing here in Bermuda. So 296-1234 is considered a local number.

1 + (10 digit number) is used when dialing to the US & Canada

011 + (whatever length of number) is used when dialing the rest of the world.


RE: DTMF not working

2xxxxxx, dial, 2N, 9
1xxxxxxxxxx, dial, 1N, 9
011N; , dial, . , 9

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Tek-Tips Forums free from inappropriate posts.
The Tek-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Tek-Tips forums is a member-only feature.

Click Here to join Tek-Tips and talk with other members!

Close Box

Join Tek-Tips® Today!

Join your peers on the Internet's largest technical computer professional community.
It's easy to join and it's free.

Here's Why Members Love Tek-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close