hey guys alright having a bit of an issue i'm running asterisk 1.4.17 i have calls coming into my asterisk machine via a iax2 trunk. once it hits the asterisk machine we have an ivr. all the dtmf works fine within the asterisk machine go thru prompts and sub menu's ect. where it stops to work is we have an option that dials out to another ivr system via the t1 card in the asterisk machine which is then connected to a channel bank providing fxs to the other ivr system. the other system pics up the calls fine but once i try to hit like option one in that ivr it's not picking it up. i have gone ahead and plugged direct lines from the lec to make sure that it's working and it worked fine. so my issue is dtmf passing thru the asterisk machine and to the fxs port. i have given kind of a layout below.
note: i have already tried a couple
changing the dtmff tone frequency thats explained here
http://astrecipes.net/index.php?n=248
i have also set my jitterbuffer=no in the iax.conf
i have also tried relaxdtmf=yes in the zapata.conf
i have also tried playing with the toneduration= option in the zapata.conf going from 100 up to 500 with nothing working.
i have also tried setting the rx and tx gains in the zapata.conf higher with nothing helping out.
i have tried connecting a sip phone direct to the asterisk machine and testing out that way so i know it's not the iax trunk since i'm having the same issues via the sip phone directly registered to the machine.
provider <---iax2 trunk ---> asterisk <--- t1 setup as fxo_ks --->channel bank giving out fxs lines.
anything else you guys think i can try let me know i'm open to try anything just about now.
zaptel dtmf issues 
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