四川攀枝花的退休教师阚老师,以前给远在加拿大的女儿打电话使用普通的IP电话卡,每分钟要2块4毛钱,电话一通,马上挂掉,改由女儿回拨,这样省钱。后来听说用中国电信17900IP电话卡拨打加拿大、美国等地每分钟仅需3毛钱,阚老师非常高兴:这下能随时给女儿从从容容打电话了! Mr. Kan, a retired teacher in Panzhihua, Sichuan Province, used to call his daughter far away in Canada using an ordinary IP phone card, which costs two cents, four cents a minute, a phone call, and hang up immediately. Later I heard that with China Telecom 17900IP phone card call Canada, the United States and other places only 3 cents per minute, Kan very happy: this time to give her daughter at any time calmly from the phone!