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VIP Webcast Recording: Troubleshooting SIP in Cisco Unified communications deployments


Okanlawon Cisco VIP

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Troubleshooting SIP in Cisco Unified communications deployments with Cisco VIP Ayodeji Okanlawon 

Watch the Recording from the original interactive event featuring Cisco Designated VIP Ayodeji Okanlawon. Tuesday, January 13, 2015 at 2:00pm London. (6am Pacific Standard Time, 9am Eastern)

During the webcast, Deji will discuss how the Session Initiation Protocol (SIP) is redefining our UC world. The Session Initiation Protocol (SIP) is a signaling communications protocol, widely used for controlling multimedia communication sessions such as voice and video calls over Internet Protocol (IP) networks.

Featured Speaker

Ayodeji Okanlawon, a Cisco Designated VIP, is the Lead Consultant Engineer for Global Solutions Design and Engineering at Verizon Business. In his past, he has worked at Intact IS, NCS Global, and Schlumberger Information Solutions. His experience includes development of design and deployment of large scale IP telephony projects on Cisco Call Manager platforms, Cisco Voice gateways, Cisco Jabber cloud and on premise solution. His expertise includes SIP solutions, CUBE design and Deployment, Troubleshooting: Voice gateways, CUCM, Unity connection, CUPS. Deji has been awarded the Cisco Designated VIP in 2013 and 2014. Deji holds a Bachelor of Science (BS), Electrical and Electronics Engineering, Second Class Upper from Obafemi Awolowo University. 

According to Deji, “If you want to advance your career, if you’re serious about your skill sets, you’ve got to be in the forums.”  (Read the Interview >>)

Need more information? Have more questions? Find more experts and topics by visiting


  • SIP: A protocol redefining our UC world
  • Understanding SIP Architecture
  • Understanding SIP Traces
  • Troubleshooting Methodology
  • Case Studies

Approximate duration: 90 minutes



Hi Ayodeji

Great Video...!!!

Am not able to access the link Could you please help

EU UC Support

Am not able to access the link Could you please help


The appears t be working. If you still access it, then try and use google to find the page.You can search for "understanding sip traces"

The appears to be working. If you still access it, then try and use Google to find the page. You can search for "understanding sip traces"

Terry Cheema

Hi Deji,

Hope you are doing well!

Looks like the guys are right I tried clicking this link and it was giving error not authorized:

Looks like there is some issue with the link and we should get it resolved so that this excellent stuff is available to everyone!


EU UC Support

Still  getting error message


You are not authorized to access this page.

Hi Terry,

Long time. I am well thank you. I hope you are doing okay too.

I will escalate this to Litsa. Lots of people have complained. Will update you guys

I will escalate this to the cisco support team. Once I get an update I will let you know.

Terry Cheema

Good on you mate!

Update guys:

I got a response to my email from cisco....

Cisco has taking down some of the documents on their website due to some customer complaints about sensitive data. They are working on making this available very soon.

Sorry for the inconvenience guys.

EU UC Support

Hi Ayodeji


Can you please help me to find the problem we are having with SIP out bound calls getting busy tone.I have gone through the Logs and found below Error


SIP Troubleshooting: SIP Call Receives 489 Bad Event Message



SIP Call Receives 489 Bad Event Message

Problem SummaryA 489 Bad Event message is received from a Unified CM or Proxy Server when a SIP call is made.
Error Message489 Bad Event
Possible CauseLogs indicate 489 Bad Event messages are being received from either the Unified CM or the Proxy Server. This event is used to indicate that the server did not understand the event package that was specified in the Event header field. The problem is that Key Press Markup Language (KPML) is trying to be used, and is currently not supported in Unified CVP.
Recommended ActionThe solution is to only use the inband Dual-Tone Multi-Frequency (DTMF) method setting (RFC 2833) on the SIP Trunk that is associated with the Unified CM or the SIP Proxy Server. This is done by selecting the last checkbox on the SIP Trunk configuration page of the Unified CM Administration page.


I have attached the log

Calling Party :-- 8548

Called Party:- 90041818374000



For the 489 bad even error, it looks like you have enabled presence on the sip trunk to CUBE. The logs show that CUCM is asking CUBE to subscribe to presence. Please uncheck (Accept presence subscription) and reset the trunk.

SUBSCRIBE sip:90041818374000@ SIP/2.0

Via: SIP/2.0/UDP;branch=z9hG4bKd3aad27a817d

From: <sip:8548@>;tag=95345456

To: <sip:90041818374000@>

Call-ID: ea2d1680-51b1f76a-d33f0-1514a8c0@


Date: Wed, 01 Apr 2015 13:49:30 GMT

User-Agent: Cisco-CUCM10.5

Event: presence

Expires: 10800

Contact: <sip:8548@>

Accept: application/pidf+xml

Max-Forwards: 69

Content-Length: 0


320164: Apr  1 14:49:30.656: //-1/xxxxxxxxxxxx/SIP/Event/ccsip_call_subscribe_response: Queued event from SIP SPI : SIPSPI_EV_CC_SUBSCRIBE_RESP
320165: Apr  1 14:49:30.656: //-1/xxxxxxxxxxxx/SIP/Event/ccsip_api_initiate_subscription_termination: Queued event from SIP SPI : SIPSPI_EV_SUBSCRIPTION_TERMINATED
320166: Apr  1 14:49:30.656: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:
SIP/2.0 489 Bad Event - 'Malformed/Unsupported Event'

Via: SIP/2.0/UDP;branch=z9hG4bKd3aad27a817d

From: <sip:8548@>;tag=95345456

To: <sip:90041818374000@>;tag=3E1B7758-2131

Date: Wed, 01 Apr 2015 13:49:30 GMT

Call-ID: ea2d1680-51b1f76a-d33f0-1514a8c0@


Allow-Events: telephone-event

Content-Length: 0


Try this and see it helps. I didn't see the call fail though. The call seem to connect ok.

Mayank Raizada

Hello Ayodeji,

As mentioned above by others, I am also getting the "Authorization Error" while trying to download the presentation.



Hi Ayodeji,

Hope you are doing well !!

Any update on the Presentation Download it still says " Authorization Error"


Waseem Akram

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