一、电话机的型号 电话机的型号包括类型、识别代码、拨号方式等内容。如“HA”表示普通电话机,“HW”表示无绳电话机,”“HL”表示录音电话机,“HCD”表示主叫号码显示机等。阿拉伯数字(3位或4位)为生产厂家的识别代码;括号内的阿拉伯数字表示生产厂家的产品系列号;“P/T”表示脉冲、音频两种拨号方式;“S”表示储存(记忆)功能;“D”为免提功能;“L”为锁控功能;“LCD”表示液晶显示功能。 First, the type of telephone The type of telephone includes type, identification code, dial-up content. For example, “HA” indicates a normal telephone, “HW” indicates a cordless telephone, “HL” indicates a recording telephone, “HCD” indicates a caller ID display, etc. Arabic numerals (3 or 4 digits) Identification code; Arabic numerals in parentheses indicate the manufacturer’s product serial number; “P / T” means both pulse and audio dialing modes; “S” means memory function; “D” means hands-free function; “For the lock control function;” LCD "said liquid crystal display.