file:///C:\Users\masc\AppData\Roaming\Tencent\Users\531636930\QQ\WinTemp\RichOle\(0CV2~72X`Q4~$5HXTR5I4T.png大家好 这是一台思科 ASR 903的路由器,麻烦大家给我讲一下上面几个接口是什么意思 ,谢谢了
## 1 PPS input and output—Mini coax connectors.
## 2.048 or 10 MHz input and output—Mini coax connectors.
## Time of Day (ToD) or 1 PPS input or output port—Shielded RJ45 jack
## BITS input/output port—RJ48 jack.