Cisco 2811 IOS VOICE question

Question

I recently inherited a Cisco 2811 Router.  I want to play with some Voice services as a test lab.  I currently have a production CUCM 8.6 environment I would like to connect it to.  It has IOS C2800NM-ENTSERVICESK9-M 12.4(17).  If I program it to register with my CCM, it always gets stuck at ""registering with CCM".  Oddly enough, I can assign it SCCP based phones, but anytime I try to play with SIP phones, the phones never register.  I am thinking its related to the "Registering with CCM" and "Current active call manager : none"   when I do a show-ccm.  Do I have the wrong IOS for voice?  I am more familiar with the X9XX series routers where you can do a sh-license and it tells you it has the UC license.  If that is the case, what is the minimum license level to support voice on the 2811 router to connect it to my CUCM8.6 using MGCP?
Thank You,
David

Answer 1

Hi David,
IOS on 2800 series routers is implemented differently , hence we do not have any licenses. Voice should work as long as we have the right IOS image. Having said that , If voice components were not enabled , we would not have been put in any commands , for MGCP etc.
Coming to the IOS version , while the image is indeed quite old , i don't think it should affect the registration . As a good practice , it is recommended to have the IOS versions and CUCM versions 'compatible', which is tabulated in the link below :
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/uc_system/unified/communications/system/versions/IPTMtrix.html
Moving on to the registration , here are some quick pointers:
1. make sure that the config on GW is as per the link below :
http://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications-manager-callmanager/42105-vg200-cfg.html
2. The GW name should match that on CUCM. Match the name in the first line of "show ccm-manager" to the name that has been added to CUCM.
3. Also , ensure the modules added on CUCM are correct.
HTH,
Harsh