以下是使用E1线路实现多个64Kbit/s专线连接。 当链路为T1时，channel-group编号为0～23，Timeslot范围为1～24；当链路为E1时， channel-group编号为0～30，Timeslot范围为1～31。 路由器具体设置如下： Current configuration: version 11.2 no service udp-small-servers no service tcp-small-servers ! hostname router1 ! enable secret 5 $ 1 $ XN08 $ Ttr8nfLoP9.2RgZhcBzkk/ enable password cisco ! ! ip subnet-zero controller E1 0 framing NO-CRC4 channel-group 0 timeslots 1 channel-group 1 timeslots 2 channel-group 2 timeslots 3 ! interface Ethernet0 ip address 133.118.40.1 255.255.0.0 media-type 10BaseT interface Ethernet1 no ip address shutdown interface Serial0:0 ip address 202.119.96.1 255.255.255.252 encapsulation hdlc no ip mroute-Cache interface Serial0:1 ip address 202.119.96.5 255.255.255.252 encapsulation hdlc no ip mroute-Cache ! interface Serial0:2 ip address 202.119.96.9 255.255.255.252 encapsulation hdlc no ip mroute-Cache no ip classless ip route 133.210.40.0 255.255.255.0 Serial0:0 ip route 133.210.41.0 255.255.255.0 Serial0:1 ip route 133.210.42.0 255.255.255.0 Serial0:2 line con 0 line aux 0 line vty 0 4 password cicso Iogin ! end1.E1和CE1的主要区别是什么