Wash,

Can you confirm if your gateway supports out of band DTMF?

GSM architecture allows for both inband (the ones you can hear) and out of band DTMF (you cannot hear these). For out of band DTMF, your modem/gateway would need to support out of band DTMF for proper detection.

Tito.

2009/8/19 Odhiambo ワシントン <odhiambo@gmail.com>


On Wed, Aug 19, 2009 at 6:58 AM, aki <aki275@googlemail.com> wrote:

@Wash, they support dtmf, as their voice mail system runs IVR. Have you tried a different codec, or pls check the log of the  gateway. It is strongly possible that they dont support dtmf inbound except for their own tools. I had a run in with Kencell a few years ago when designing an inbound data sessions system. They were blocking both CSD and GPRS inbound on their network and it never got resolved. I had to move to safcom for this. And also discovered that most ATMs were using safcom data CSD for their sessions.


@Aki,

I will try a different codec and test both Safaricom and Zain. The only reason I will do this is because while testing with Safaricom, I had a "slaky" function on my system in which the end system seemed to not get the correct DTMFs. I'd dial something like 3595 and the system would tell me it got 355995, or something different. So I am open to suggestions still but will get back once I try a different codec anyway.

PS: How comes you know all these things? Now I agree with what someone once said here - that Wikipedia uses you as reference point:-)


--
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254733744121/+254722743223
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"If you have nothing good to say about someone, just shut up!."
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