[cisco-voip] international calling ... preemption

[Kevin Damisch]

Jonathan,

>From this link:
http://www.cisco.com/en/US/tech/tk801/tk379/technologies_tech_note09186a008012e95f.shtml

88

Preemption

Your call is blocked. Calls are sometimes blocked if another call has a higher priority than your call. This situation is common with voice calls. Wait and call again later.
If you use a PBX (or the remote site to which you connect uses a PBX), check the configuration of the PBX. If the condition persists, contact your telco.


Another place to check, even though it was on an Avaya (sorry for the profanity):
http://www.tek-tips.com/viewthread.cfm?qid=1585433&page=1

I haven't seen this before, but it is at least a start for you.  Try to strip the 011 in front of the dialed number or verify with the carrier any restrictions or requirements they have for international calls.

Thanks,
Kevin

From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Madziarczyk, Jonathan
Sent: Thursday, May 27, 2010 10:48 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] international calling ... preemption

So I'm trying to set up some basic international calling on my H323 gateway.  But I'm getting a preemption error in my Q931 debugs and a fast busy on the phone.  Is the problem on the Gateway or on the PSTN side, and how can I tell?

Dial-peer voice 1 pots
Destination-pattern 9011............ (12 periods)
Direct-inward-dial
Port 0/0/0 :23

My Q931 looks something like this :
May 27 15:04:24.818: ISDN Se0/0/0:23 Q931: TX -> SETUP pd = 8  callref = 0x0090
        Bearer Capability i = 0x8090A2
                Standard = CCITT
                Transfer Capability = Speech
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0xA98397
                Exclusive, Channel 23
        Calling Party Number i = 0x2181, 'mynumber'
                Plan:ISDN, Type:National
        Called Party Number i = 0x91, '011442074999000'
                Plan:ISDN, Type:International
May 27 15:04:24.878: ISDN Se0/0/0:23 Q931: RX <- RELEASE_COMP pd = 8  callref = 0x8090
        Cause i = 0xC088 - Preemption

Ideas?

JM

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