Hi guys,
I have two routers, a 3745 with c3745-ipvoicek9-mz.124-18.bin and a 2811 with c2800nm-spservicesk9-mz.124-3i.bin connected to a PBX Mitel.
Both my routers connect to the Pbx via on E1.
The configs are
3745:
sh run | s controll
controller E1 1/0
pri-group timeslots 1-31 service mgcp
controller E1 1/1
shutdown
sh run | s Serial
interface Serial1/0:15
no ip address
encapsulation hdlc
isdn switch-type primary-qsig
isdn timer T310 120000
isdn overlap-receiving
isdn protocol-emulate network
isdn incoming-voice voice
isdn bind-l3 ccm-manager
no cdp enable
2811
sh run | s controll
controller E1 0/0/0
pri-group timeslots 1-31 service mgcp
sh run | s Serial
interface Serial0/0/0:15
no ip address
isdn switch-type primary-qsig
isdn protocol-emulate network
isdn incoming-voice voice
isdn T310 120000
isdn bind-l3 ccm-manager
no cdp enable
The problem is that from time to time (about 20 times a month) the E1 connection is dropped and then restarted in a couple of minutes.
This is a log form the routers
006980: Aug 26 11:37:52.711: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to down (LOS detected)
006981: Aug 26 11:37:52.739: %ISDN-6-LAYER2DOWN: Layer 2 for Interface Se0/0/0:15, TEI 0 changed to down
006982: Aug 26 11:37:54.712: %LINK-3-UPDOWN: Interface Serial0/0/0:15, changed state to down
006983: Aug 26 11:38:38.712: %CONTROLLER-5-UPDOWN: Controller E1 0/0/0, changed state to up
006984: Aug 26 11:38:40.712: %LINK-3-UPDOWN: Interface Serial0/0/0:15, changed state to up
006985: Aug 26 11:39:29.305: %ISDN-6-LAYER2UP: Layer 2 for Interface Se0/0/0:15, TEI 0 changed to up
I can see the reason is LOS detected but i don't really know what that is.
Can anyone help me please?
Thank you,
Good day.
