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RTMT application cannot communicate with specified node/cluster

Level 1
Level 1

Hi All,


We have just installed cucm version 12.

I've downloaded rtmt plugin but i'm not able to login.


I'm facing this message.


RTMT application cannot communicate with specified node/cluster.

Please verify the host IP address is correct and the network connection is up, and try again.


Any help would be appreciated.

3 Replies 3

I have found more success using RTMT on a linux virtual machine than on windows.

You probably would like to try that.


Rolando A. Valenzuela

btw, RTMT uses an non-standard port, that could be blocked by the firewall also.

Level 1
Level 1

Hmmmmm ...


check you IPs for both pub and subs. Did you change the domain name for the CUCM from alphabetical to its IP original IP



Level 1
Level 1

Hello Monasir,


Regarding this i would suggest you the below : 


1. Please make sure we are entering the correct ip address/ hostname and password.


2 .Check for reachability from your machine that has RTMT installed to the server you are trying to login.


3. Try and logging from a different machine to RTMT,


3. Also you can try and clear certficates when the RTMT pop ups and chec if that works..


4. If issue still persist, try and re-installing the RTMT.


Thanks & Regards




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