Another day, another new market for Shaw Communications' cable telephony service. Shaw is now offering service in Winnipeg - putting it head to head in telephony and TV with Manitoba Telecom Services, which has enjoyed growing success with its digital TV service in the past 18 months. Shaw, which has signed up more than 20,000 telephony customers since February in Edmonton and Calgary, is offering a discount of up to $15 on telephone service to customers who also buy its digital TV and high-speed Internet products.