2009/8/24 Daniel kamau <kamaud@gmail.com>

Odhiambo ,

DTMF tones are enabled on our Zain MSC-S. It’s not restricted to our interconnect partners as he has reported, but it also works from Zain to Zain.

Hi Daniel,

What is MSC-S? ;-)
I can bet my life that DTMF does not work from Zain to Zain. I have a Zain engineer trying to find a solution to this problem since I reported but we are still at square 1 since last week.

I made a test call; Zain-to-Zain and DTMF was being sent. Attached are the traces to prove this.

Oh, really. Where are the traces (not that I even know how to read them!)?
Anyway, if you want proof, please call 0732 325666 from a Zain line and follow the prompts. My test extensions is 3504 or 3340. Try and get me on any of them (*3504 or *3340). You will for sure be sent to a fallback extension (for a Hunt Group) because the DTMF will not do. Once this fails, you can call me on my Zain number (0733 744121) and I will put a Safaricom line on the same system and let you call it and run/compare the same tests. It's not a bluff.

We also have IVR applications that work from DTMF and yet they are operational. For instance, 155, 222, etc…I still don’t see why it shouldn’t work.

The only reason mine wouldn't work would be if the GSM gateway I use favors Safaricom rather than Zain but I wonder how it will get to differentiate between them:-)