ISDN TA接入方案:这是家用或小单位用的ISDN接入方案。由于一般TA只有一个RS232电脑传输接口、两个或两个以上模拟电话接口,因此只能满足单台PC上网和多台普通电话或其它模拟通信设备的连接。由此可派生出一个功能是连接在TA上的普通电话可以相互通话。 在该方案中由于NT1是局端设备, 用户只需采购TA适配器,且原来的通信设备也能发挥作用。申请ISDNTA接入后,用户原来的电话线虽然没有改变,但传输信 ISDN TA Access Scheme: This is an ISDN access scheme for home or small units. Because generally TA has only one RS232 computer transmission interface, two or more analog telephone interfaces, it can only meet the connection of single PC Internet and multiple ordinary phones or other analog communication devices. This can be derived from a function is connected to the ordinary phone on the TA can talk to each other. In this scenario, since NT1 is a central office device, users only need to purchase a TA adapter, and the original communication device can also play a role. Apply for ISDNTA access, the user’s original phone line although no change, but the transmission of the letter