参考答案： Dear Sirs, Thank you for ordering more of our computer peripherals. As you know, our policy is to continuously improve the quality and performance of our products. So the modem you requested, Model T873 is no longer in production. We have replaced it with a better model, ET873. This new model outperforms the old version by 3 times but costs only half a dollar more. We have enclosed a detailed technical data sheet. We will deliver your order immediately after you send us your confirmation.
