[cisco-voip] international dialing

[Jeff Behl]

I'm trying to dial a London number but failing.  Debug shows:

        Bearer Capability i = 0x8090A2
                Standard = CCITT
                Transer Capability = Speech
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0xA98395
                Exclusive, Channel 21
        Calling Party Number i = 0x2181, '8055685555
                Plan:ISDN, Type:National
        Called Party Number i = 0x91, '011442079365555'
                Plan:ISDN, Type:International
*Apr  2 19:18:09.828: ISDN Se1/0:23 Q931: RX <- RELEASE_COMP pd = 8  
callref = 0x93D2
        Cause i = 0xC284 - Vacant code or prefix digit not dialed


Anyone know what 'Vacant code or prefix digit not dialed' means?  I'm 
guessing that 'vacant code' means the number doesn't exist, yet i'm able 
to get through using the same number on my cell phone.  any help would 
be appreciated.

(the numbers have been changed to protect the innocent)

jeff