I have 2 faxes connected to 2 separate ports of an ASM. I then have 1 line A+R on each port. The port rings about 2 times regularly, then forwards to a strange sounding ring then gets answered by a modem. It is not the actual fax machine answering because it does this when the fax isn't connected. The lines are T-1 set up as ground start. I have no RAD on the system. Any ideas?