Hi Everybody,
There are some drop calls happened recently, then I have enabled the debug Q921 and Q931 in the voice gateway
And found that the ISDN shutdown and re-established by itself (even there is no body using the T1)
(sometimes 5times per hour, sometomes 1 time per hour)
I really have no idea why it happen like that?
current environment: CUCM8.6 + VG 2811
the debug as follows
Jan 28 05:05:31: ISDN Se0/1/0:23 Q921: User TX -> RRf sapi=0 tei=0 nr=0
Jan 28 05:05:31: ISDN Se0/1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=0
Jan 28 05:05:41: ISDN Se0/1/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=0
Jan 28 05:05:41: ISDN Se0/1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=0
Jan 28 05:05:51: ISDN Se0/1/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=0
Jan 28 05:05:51: ISDN Se0/1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=0
Jan 28 05:06:01: ISDN Se0/1/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=0
Jan 28 05:06:01: ISDN Se0/1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=0
Jan 28 05:06:08: %CONTROLLER-5-UPDOWN: Controller T1 0/1/0, changed state to down (RAI detected)
Jan 28 05:06:08: ISDN Se0/1/0:23 Q931: L3_ShutDown: Shutting down ISDN Layer 3
Jan 28 05:06:08: ISDN Se0/1/0:23 Q931: Ux_DLRelInd: DL_REL_IND received from L2
Jan 28 05:06:08: %MARS_NETCLK-3-HOLDOVER: Entering Holdover for Controller T1 0/1/0
Jan 28 05:06:10: %LINK-3-UPDOWN: Interface Serial0/1/0:23, changed state to down
Jan 28 05:06:11: %CONTROLLER-5-UPDOWN: Controller T1 0/1/0, changed state to up
Jan 28 05:06:11: ISDN Se0/1/0:23 Q921: L2_EstablishDataLink: sending SABME
Jan 28 05:06:11: ISDN Se0/1/0:23 Q921: User TX -> SABMEp sapi=0 tei=0
Jan 28 05:06:11: ISDN Se0/1/0:23 Q921: User RX <- UAf sapi=0 tei=0
Jan 28 05:06:13: %LINK-3-UPDOWN: Interface Serial0/1/0:23, changed state to up
Jan 28 05:06:15: %MARS_NETCLK-3-HOLDOVER: Exiting Holdover for Controller T1 0/1/0
Jan 28 05:06:21: ISDN Se0/1/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=0
Jan 28 05:06:21: ISDN Se0/1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=0
Jan 28 05:06:31: ISDN Se0/1/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=0
Jan 28 05:06:31: ISDN Se0/1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=0
Jan 28 05:06:41: ISDN Se0/1/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=0
Jan 28 05:06:41: ISDN Se0/1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=0
Jan 28 05:06:51: ISDN Se0/1/0:23 Q921: User TX -> RRp sapi=0 tei=0 nr=0
Jan 28 05:06:51: ISDN Se0/1/0:23 Q921: User RX <- RRf sapi=0 tei=0 nr=0
Any body could help?
Thanks
Sam
