Hi friends, I am experiencing lot of duplicate digits especially when people dial-in using Cellular phones. here is my config; ----PSTN(PRI)---Asterisk A---(IAX)---------Asterisk B------SIP Phones, H.323 G/W Asterisk A switches calls to Asterisk B. Asterisk B answers the call and collects the dtmf digits to route the call. I can see lot of duplicate digits when Asterisk B is collecting digits. Duplicate digits are evident when originated from Cellular phones. I've noted reading the list that relaxdtmf would make this problem solve to a certain extent. Could relaxdtmf be applied in Asterisk B in iax.conf ??? Thanks a bunch for your response. Cheers SW