connecting a speakeasy unit for ucd voicemail etc i find that the digital extns will not send dtmf tones to the new analogue unit. it connects to the unit but as soon as you press any digit it appears to lose the speech path giving silence until the unit times out.there is also a startalk 180 connected and the extns have no trouble communicating with it.is there anything i can do to make the digital extns send out dtmf tones?