We have a customer with a Siemens HiPath and Xpressions voice mail sorry for some reason I don't have the versions. Here is the problem,

when an outside call comes in thru the PRI, thru the CSU/DSU, thru the T-1 card and finally getting to the processor, the harmonics are getting distorted and the auto attendant does not recognize them. For example, when a customer dials an extension, it sends the call to another extension. Does anyone out there have a clue what could be the problem? We have tested several times, but would like your expertise advise. Thanks so much.