真正决定传真机性能的技术指标有3项：发送速度、灰度级和清晰度。1发送速度即传真发送一页标准A4纸文件所需要的时间，通常分为23s、18s、15s、9s、6S等几种。发送时间越短，效率就越高，每次花费的电话费也越少。一股正常情况下，15s传真机传送1页A4纸的时间不会超过1min，电 There are 3 technical indicators that really determine the performance of a fax: sending speed, grayscale, and sharpness. 1 Sending speed is the time required to send a standard A4 paper document by fax. It is usually divided into 23s, 18s, 15s, 9s, 6s and so on. The shorter the delivery time, the higher the efficiency, and the less each phone call costs. A normal situation, 15s fax machine to send a page of A4 paper time will not exceed 1min, electricity