[cisco-voip] One way audio en FXS configured with SCCP or MGCP

[ROZA, Ariel]

Hi, Guys!

  Has anyone experienced something like this before?

  I have a 2801 Router With a VIC2-2FXS configured via SCCP. When calling from an IP Phone to the FXS port I get One way audio. The IP Phone does not hear a thing. The reverse works fine.
Also, if I change the protocol to h323, everything works without issues. It seems the same happens wiith MGCP, but I have not tested through...

  The IOS release is 12.4(9)T7

Can anyone help me?

Regards,

 ARIEL ROZA
Service Delivery Engineer
 LOGICALIS
Peru 327 1° Piso - C.A.B.A. - Argentina - C1063ACH
Tel/Fax: +54 (11) 4344-0300
ariel.roza at la.logicalis.com
www.la.logicalis.com
www.logicalisnow.com
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From: Wes Sisk
Sent: Mon 28/09/2009 16:26
To: Ed Leatherman
Cc: cisco-voip mailinglist
Subject: Re: [cisco-voip] DNS client on CUCM, Unity servers?


Enabling DNS will affect all operations. It's not a component-wise defined feature, think all or nothing. 

All code calls gethostbyname(), gethostbyip(),gethostentry().. which invokes host name resolution features.

Just make sure:
1. forward resolution for all servers work
2. reverse resolution for all servers work
3. all servers use same dns suffix

CLI 'set network dns...' is the command set to set and enable dns.

/Wes

On Monday, September 28, 2009 3:09:26 PM, Ed Leatherman mailto:ealeatherman at gmail.com wrote:

Follow-up question about DNS.. 

Originally I did not enable DNS on any nodes, as it was not needed. I would now like to configure an SMTP server for alerts, and our systems group wants me to use a name instead of IP. Are there any ramifications to turning on DNS, regarding things like database replication or intracluster communications? My servers are all defined by IP addresses, so it should be using that through-out, right?

I'm assuming various "set network dns*" commands will turn this on if I decide to do that.


On Tue, Aug 18, 2009 at 10:46 AM, Wes Sisk <wsisk at cisco.com> wrote:

On the surface this seems an odd question so I'm sure there is misunderstanding.

CM needs access to DNS to perform forward and reverse lookups on:
SIP endpoints
h323 endpoints
AD servers
other nodes in the cluster

There are deployments which do not use any of these and therefore do not need access to a DNS server.  On those, DNS can be disabled.

/Wes 


On Tuesday, August 18, 2009 1:54:37 AM , ciscozest mailto:ciscozest at gmail.com wrote:

We have 3 CUCM 7.0 servers and only one Unity Connection 7.0 server.
We use a load balancer for IP Phone services redundancy. There is no integration with any third party components. When I check our UC system, I found out that DNS client service is enabled on both CUCM and Unity servers which I don't quite understand why is needed. The Services URL on CUCM is pointing to load balancer IP. Would there be any other reason we have to enable DNS client on CUCM and Unity server? Also is there a load impact by enabling DNS client service?

Thank you.

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-- 
Ed Leatherman
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