Conducting marriage contract by phone

I want to get married to a girl whose father is in another country, and at present I cannot travel there for us to meet and do the marriage contract, because of my financial situation and other reasons. I am living in a foreign country. Is it permissible for me to call her father on the phone so that he can say to me, “I marry my daughter so and so to you,” and I can say, “I accept,” with the girl’s consent and with two Muslim witnesses listening to what is said by means of loudspeakers attached to the phone? Would this be considered a valid marriage contract in shari’ah?