What works for me: Use the phone jack in your modem or use an adapter that joins two devices to one line, put your modem connection in one side and analog telephone in the other side.
Start WinSPM and connect via the connection type manual (assisted transfer).
After touching connect, select the modem you are using from the pull-down.
DO NOT follow the instructions in the next box.
Instead call your customer and ask to be transferred to *10, wait until you hear the modem tone in your handset, click OK. Wait again until you hear a faint click( like someone picking up on an extension), then with your finger, press down on the switch-hook to remove the single line phone from the connection, then without releasing the switch-hook carefully place the handset back on the phone. While you were doing all this you will hear (via the modem’s speaker) the modems handshake, once handshaking is complete the noise will go away, and the password box will appear.
I use this method everyday and almost never have a failure to communicate. Unless the modem in the called switch is hosed (you will not here a clear modem tone), which means the customer must power cycle the switch to completely reset the modem. Other failures usually relate to line problems, mostly T-1 PRI lines that don’t want to pass analog data. (Usually a clocking error somewhere, but it can be the service provider’s circuit, and then they need to stress test and correct the errors) The symptoms are what I call runaway data, keep your eye on the little box next to the abort button in WinSPM, and the screens in SPM jump around and even go into different languages, at that point disconnect, it isn’t going to get better and may even cause a worse problem.
Good Luck!
42 years in the business and counting.
