Cisco 857 подключена к компьютеру через serial интерфейс к единственному COM порту. При включении или выключении питания компьютера Cisco виснет и не отвисает до перезагрузки. Кто нибудь сталкивался  сподобным, чем тут можно помочь?

sh ver показывает следующее:

Cisco IOS Software, C850 Software (C850-ADVSECURITYK9-M), Version 12.4(15)T9, RELEASE SOFTWARE (fc5)

sh run:

!
! Last configuration change at 00:12:47 OMSK Fri Nov 13 2009
! NVRAM config last updated at 23:25:26 OMSK Thu Nov 12 2009
!
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname local
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
clock timezone **** *
clock save interval 8
!
!
dot11 syslog
!
dot11 ssid ****
   authentication open
   guest-mode
!
no ip dhcp use vrf connected
ip dhcp excluded-address 192.168.0.254
ip dhcp ping packets 5
!
ip dhcp pool local
   import all
   network 192.168.0.0 255.255.255.0
   default-router 192.168.0.254
   dns-server 192.168.0.254
   domain-name local
!
ip dhcp pool local.comp.fe.1
   host 192.168.0.1 255.255.255.0
   client-identifier ****.****.****
   client-name local.nbook.fe
   lease infinite
!
ip dhcp pool local.nbook.fe
   host 192.168.0.2 255.255.255.0
   client-identifier ****.****.****
   client-name local.nbook.fe
   lease infinite
!
ip dhcp pool local.nbook.wifi
   host 192.168.0.3 255.255.255.0
   client-identifier ****.****.****
   client-name local.nbook.wifi
   lease infinite
!
ip dhcp pool local.kpk
   host 192.168.0.4 255.255.255.0
   client-identifier ****.****.****
   client-name local.kpk
   lease infinite
!
!
ip cef
!
!
!
!
!
archive
log config
  hidekeys
!
!
!
bridge irb
!
!
interface FastEthernet0
!
interface FastEthernet1
!
interface FastEthernet2
!
interface FastEthernet3
!
interface FastEthernet4
mac-address ****.****.****
no ip address
duplex auto
speed auto
bridge-group 1
!
interface Dot11Radio0
no ip address
!
ssid disia
!
speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0
channel 2437
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 spanning-disabled
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
!
interface Vlan1
no ip address
!
interface BVI1
ip address 192.168.0.254 255.255.255.0
!
ip forward-protocol nd
!
no ip http server
no ip http secure-server
!
!
control-plane
!
bridge 1 protocol ieee
bridge 1 route ip
!
line con 0
no modem enable
line aux 0
line vty 0 4
!
scheduler max-task-time 5000
end