# FX100 DTMF Detection Mode

**URL:** <https://forum.sierrawireless.com/t/fx100-dtmf-detection-mode/7099>\
**Category:** Legacy FX/FXT series\
**Created:** [March 21, 2014, 8:10am UTC](https://forum.sierrawireless.com/t/fx100-dtmf-detection-mode/7099 "2014-03-21T08:10:49Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![kspang](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/kspang/32/1845_2.png) [@kspang](https://forum.sierrawireless.com/u/kspang)\
**Post date:** [March 21, 2014, 8:10am UTC](https://forum.sierrawireless.com/t/fx100-dtmf-detection-mode/7099/1 "2014-03-21T08:10:49Z")

</div>

As specified in the AT Command Interface Guide document, the +WDDM AT command could be used to enable DTMF detection.

I have set it to AT+WDDM=1 before a call is established.

However, nothing was returned from the modem after the remote side keys were pressed.  
From the document, the expected return should be

> [@](#):
>
> +WDDI: “\*”,60

Any idea to make DTMF detection working?

Thank you.

---

<div class="post-metadata">

**Author:** ![lotam](https://avatars.discourse-cdn.com/v4/letter/l/958977/32.png) [@lotam](https://forum.sierrawireless.com/u/lotam)\
**Post date:** [March 21, 2014, 1:55pm UTC](https://forum.sierrawireless.com/t/fx100-dtmf-detection-mode/7099/2 "2014-03-21T13:55:32Z")

</div>

Would you please share the FW version tested?

Thx.

---

<div class="post-metadata">

**Author:** ![kspang](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/kspang/32/1845_2.png) [@kspang](https://forum.sierrawireless.com/u/kspang)\
**Post date:** [March 24, 2014, 1:21am UTC](https://forum.sierrawireless.com/t/fx100-dtmf-detection-mode/7099/3 "2014-03-24T01:21:21Z")

</div>

FW version should be 7.50

AT+CGMR returns:

> [@](#):
>
> R7.50.0.A2.201302191346.FX100 …

---

<div class="post-metadata">

**Author:** ![lotam](https://avatars.discourse-cdn.com/v4/letter/l/958977/32.png) [@lotam](https://forum.sierrawireless.com/u/lotam)\
**Post date:** [March 31, 2014, 1:46am UTC](https://forum.sierrawireless.com/t/fx100-dtmf-detection-mode/7099/4 "2014-03-31T01:46:48Z")

</div>

Hi,

Maybe FW issue?

Here’s my test log using latest FW:

```auto
ati3

R7.53.0.201403060723.FX100 1784920 030614 07:23

OK
AT+WDDM=1

OK

RING
ata

OK

+WDDI: "1",20

+WDDI: "2",20

+WDDI: "3",20

+WDDI: "4",20

+WDDI: "5",20

+WDDI: "6",20

+WDDI: "7",20

+WDDI: "8",20

+WDDI: "9",20

+WDDI: "0",20

+WDDI: "*",20

+WDDI: "#",20

NO CARRIER

+WIND: 6,1
```

The FW running in your FX100 is 1 year old…  
Can you please upgrade to latest FW and test?

Thx.

---

<div class="post-metadata">

**Author:** ![sushil](https://avatars.discourse-cdn.com/v4/letter/s/e19adc/32.png) [@sushil](https://forum.sierrawireless.com/u/sushil)\
**Post date:** [March 31, 2014, 5:04am UTC](https://forum.sierrawireless.com/t/fx100-dtmf-detection-mode/7099/5 "2014-03-31T05:04:54Z")

</div>

For Q2698, Audio AT commands were not supported on 7.50.A2 firmware. They were added in FW 7.52.A1. You should be able to see it in FW 7.52.A1 release notes, that is expected soon.