Got it!

Aug 30 18:43:51.075: ISDN Se0/0/0:23 Q931: RX <- SETUP pd = 8  callref = 0x0097
        Bearer Capability i = 0x8090A2
                Standard = CCITT
                Transfer Capability = Speech
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0xA98381
                Exclusive, Channel 1
        Progress Ind i = 0x8583 - Origination address is non-ISDN
        Display i = 'Emergency Services'
        Calling Party Number i = 0x0080, '911'
                Plan:Unknown, Type:Unknown
        Called Party Number i = 0xC1, '2522004'
                Plan:ISDN, Type:Subscriber(local)
Aug 30 18:43:51.075:
cmbrl_send_pak: --> Sending backhauled msg for Se0/0/0:23 :
        | bk_msg_type = DATA_IND
        | bk_chan_id (slot:port) = 0:0
        | Q.931 length = 56
        | Q.931 message type: SETUP
        | Q.931 message = 
080200970504038090A21803A983811E0285832812456D657267656E63792053657276696365736C0500803931317008C132303232303034
Aug 30 18:43:51.083:
cmbh_rcv_callback: <-- Receiving backhaul msg for Se0/0/0:23 :
        | bk_msg_type = DATA_REQ
        | bk_chan_id (slot:port) = 0:0
        | Q.931 length = 9
        | Q.931 message type: RELEASE COMPLETE
        | Q.931 message = 080280975A08028081
Aug 30 18:43:51.083: ISDN Se0/0/0:23 Q931: TX -> RELEASE_COMP pd = 8  callref = 
0x8097
        Cause i = 0x8081 - Unallocated/unassigned number
Aug 30 18:43:53.952: MGCP Packet sent to 192.100.64.18:2427--->
NTFY 456169746 *@router.ccie.com MGCP 0.1
X: 0
O:
<---

Aug 30 18:43:53.952: MGCP Packet received from 192.100.64.18:2427--->
200 456169746
<---


From: Bruno Nonogaki [mailto:[email protected]]
Sent: Thursday, August 30, 2012 2:42 PM
To: Jason Aarons (AM)
Cc: [email protected]
Subject: Re: [OSL | CCIE_Voice] MGCP Calls to DN not in use and debug mgcp 
packet



I think you are trying to see messages which are backhauled to CUCM (q931). 
Gateway doesn't care about numbers, dial plans and stuffs like that, because it 
is all inside the q931 messages, which you can see with debug ccm-manager 
backhaul packets.

So the gateway doesn't ask the call-agent about the number. It does't have this 
intelligence...


On Thu, Aug 30, 2012 at 2:03 PM, Jason Aarons (AM) 
<[email protected]<mailto:[email protected]>> wrote:
Playing around with debug mgcp packet on gateway.

CallManager doesn't have any DNs matching the number. How come I don't see the 
gateway asking the call-agent about the number via MGCP messages? How does the 
gateway know it's unassigned without asking the call-agent?


I suspect a RQNT  > R: D/[0-9ABCD*#] is in a loop watching the digits, but the 
number should be sent to callmanager to check the dialplan right? Or does 
gateway have dial-pan in memory, etc?


Debug mgcp packet
Debug isdn q931

Aug 30 16:52:41.620: ISDN Se0/0/0:23 Q931: RX <- SETUP pd = 8  callref = 0x008E
        Bearer Capability i = 0x8090A2
                Standard = CCITT
                Transfer Capability = Speech
                Transfer Mode = Circuit
                Transfer Rate = 64 kbit/s
        Channel ID i = 0xA98381
                Exclusive, Channel 1
        Progress Ind i = 0x8583 - Origination address is non-ISDN
        Display i = 'Emergency Services'
        Calling Party Number i = 0x0080, '911'
                Plan:Unknown, Type:Unknown
        Called Party Number i = 0xC1, '2522009'
                Plan:ISDN, Type:Subscriber(local)
Aug 30 16:52:41.628: ISDN Se0/0/0:23 Q931: TX -> RELEASE_COMP pd = 8  callref = 
0x808E
        Cause i = 0x8081 - Unallocated/unassigned number

No mgcp packets in debug

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