A.32 B.64 C.1920 D.4096
A.失敗原因值=0000001未分配的號(hào)碼 B.失敗原因值=0000010無(wú)路由到指定的轉(zhuǎn)接網(wǎng) C.失敗原因值=0010001用戶忙 D.失敗原因值=0100010無(wú)電路可用
A.2時(shí)至6時(shí) B.0時(shí)至4時(shí) C.1時(shí)至5時(shí) D.0時(shí)至6時(shí)