[cisco-voip] IP Communicator 7.0(1)

[Truelove_John]

We had the same problem with one-way audio in CUPC and it was our
firewall that was blocking some of
the ports.  If you have a firewall in the middle, check there.

John


-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Cauthen, John
A.
Sent: Tuesday, May 12, 2009 10:05 AM
To: Ryan Ratliff
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] IP Communicator 7.0(1)

This is happening to everyone, not one particular person.

Yes, the IP address is routable.  We tested that by connecting directly
to a port on the core switch that was on the VPN VLAN so, the laptop
received an IP address in the VPN VLAN IP range.  In that scenario CIPC
worked just fine.  

I can go through the VPN and get the same IP address I did when directly
connected to the switch, but it will be one-way audio.

Thanks,
John


-----Original Message-----
From: Ryan Ratliff [mailto:rratliff at cisco.com] 
Sent: Tuesday, May 12, 2009 9:18 AM
To: Cauthen, John A.
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] IP Communicator 7.0(1)

Is the caller in your description the one using CIPC?

In your Wireshark capture look at the SCCP OpenReceiveChannelAck that  
CIPC sends to CUCM.  Make sure the IP address CIPC sends is routable  
to the devices on the other side of the VPN.

-Ryan

On May 12, 2009, at 9:09 AM, Cauthen, John A. wrote:

We are experiencing a one-way audio issue when using IP Communicator  
7.0(1) through VPN.  The caller can hear the other party but, the  
other party cannot hear the caller.  Troubleshooting:



-          CIPC works in the office on the LAN

-          CIPC works when directly connected to a port on the core  
Switch on the VPN VLAN (receiving a VPN IP address)

-          CIPC doesn't work through the Cisco ASA SSL VPN solution,  
or the Cisco VPN Concentrator

-          We have also used Wireshark to see if there was any  
difference in the communication when going through VPN compared to  
when CIPC works.  The only thing I notice is that when connected to  
the VPN the communication is one-way as well.  The source is always  
the voice VLAN.



We are on CUCM 6.1(2) using SCCP.   If you can help please let me  
know what I am missing...I am sure it is just staring me in the face.



  Thanks,



John

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