This, of course, is totally dependent on the features of the modem and the modem driver. The modem properties (that you can reach via the external connections icon of your connection) should have a setting to choose between pulse and tone, if the modem supports it.
So all I can advise here is to go out and search for it.
Your might try to find a manual for that particular chipset on www.agere.com, but I'm not sure it's there. And they say "Agere Systems manufactures modem chipsets for V.90. The chip sets are sold to original equipment manufacturers (OEM), who in turn builds the modem and should support technical questions.", which implies that they think that IBM customer support should answer your question.
If you can't solve this, and still want to use your laptop in your cottage, I'm afraid you will have to buy another modem. I've had a USB dial-up modem myself (when I still had dialup), and I suppose you can still find them. A perfect selection criterion: does it support pulse?
Hopet this helps.
I have a IBM 2003 R31 laptop which I run in the city over a telephone line which has touch tone. The computer has a Modem Agere Systems AC'97 Modem(com3). Everything works fine in the city. When I take the computer to the cottage it will not hook up to the service provider because the phone is set up for use with pulse. All 2 other computers pre 2001 work fine but not my laptop. The desktop computer properties works with a \Conexant HCF V90 56K DataFax PCI mode. Can anyone suggest how I can possibly change a setting to make my newer laptop work at the cottage?