Which of the following belong to the ISDN TE2 function group? (Choose two)<br>A. A standard PC.<br>B. An ISDN phone.<br>C. An ISDN terminal adapter.<br>D. A router serial interface.<br>E. A router ISDN BRI “U” interface.<br>Answer: A, D<br>关于d有点晕<br><br>D我觉得应该是TE1吧?因为是S参考点引出来的……不知不知,老大来回答