[cisco-voip] Delayed Ringback

[Lemon]

Hi,

Been running CUCM  6.1.2.1000-13 for a while now and since this
morning we seem to be having problems with incoming calls. We see the
calls come into the voice gateway (H323) but only after 10 sec does
the gateway send out and alert. However.....this only seems to be
happening for certain extensions as the main number works fine. Some
debugs included:

Oct 20 12:07:20.892: ISDN Se0/0/0:15 Q931: RX <- SETUP pd = 8  callref = 0x1787
        Bearer Capability i = 0x8090A3
                Standard = CCITT
                Transfer Capability = Speech
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0xA18382
                Preferred, Channel 2
        Calling Party Number i = 0x0183, '087XXXXXXX'
                Plan:ISDN, Type:Unknown
        Called Party Number i = 0xA1, '19XX'
                Plan:ISDN, Type:National
        Sending Complete
Oct 20 12:07:20.912: ISDN Se0/0/0:15 Q931: TX -> CALL_PROC pd = 8
callref = 0x9787
        Channel ID i = 0xA98382
                Exclusive, Channel 2
Oct 20 12:07:42.065: ISDN Se0/0/0:15 Q931: TX -> ALERTING pd = 8
callref = 0x9787


and for the main number :

P21GW#
Oct 20 12:22:44.490: ISDN Se0/0/0:15 Q931: RX <- SETUP pd = 8  callref = 0x178B
        Bearer Capability i = 0x8090A3
                Standard = CCITT
                Transfer Capability = Speech
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0xA18381
                Preferred, Channel 1
        Calling Party Number i = 0x0183, '087XXXXXXX'
                Plan:ISDN, Type:Unknown
        Called Party Number i = 0xA1, '19YY'
                Plan:ISDN, Type:National
        Sending Complete
Oct 20 12:22:44.506: ISDN Se0/0/0:15 Q931: TX -> CALL_PROC pd = 8
callref = 0x978B
        Channel ID i = 0xA98381
                Exclusive, Channel 1
Oct 20 12:22:44.546: ISDN Se0/0/0:15 Q931: TX -> ALERTING pd = 8
callref = 0x978B
Oct 20 12:22:46.466: ISDN Se0/0/0:15 Q931: TX -> CONNECT pd = 8
callref = 0x978B
Oct 20 12:22:46.486: ISDN Se0/0/0:15 Q931: RX <- CONNECT_ACK pd = 8
callref = 0x178B
Oct 20 12:22:46.490: %ISDN-6-CONNECT: Interface Serial0/0/0:0 is now
connected to 087XXXXXXX N/A

any ideas

thnx
charl