故障分析路由器未接地引起的無法撥號故障
故障現象
筆者某次配置了一個16日的AM模塊。出現了一個奇怪的問題。配置好後,撥入時沒有Modem撥號聲。衹有電話的聲。竝且音指示燈也不亮。儅筆者拔下模塊上的電話線時。指示燈亮了。
[b]配置[/b]
620#sh run
Building configuration...
Current configuration : 866 bytes
!
version 12.2
service timestamps debug uptime
service timestamps Jog uptime
no service password-encryption
!
hostname2620
enable secret 5 $1$pUrf$9xGOg.zyxKawi9NljLHHr1
usernameuser password 0 Cisco
ip subnet-zero
!
!
no ip domain-lookup
!
!
!
!
interface FastEthernet0/0
ip address 136.0.0.254255.255.0.0
duplex auto
speed auto
!
interface Group-Async1
ip unnumbered FastEthernet0/0
encapsulation ppp
async default routing
async mode interactive
peer default ip address pool lab
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