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Can someone confirm if it´s really needed to use module ISM-SRE-300-K9 to install CCME in a Cisco 2901?

We are going to install a new Cisco Call Manager Express in a Cisco Router 2901. The vendor suggested us to buy the module: ISM-SRE-300-K9. I was checking the Cisco documentation and it seems this module is more used by Cisco Unity not Cisco Call Manager Express. We are going to have 10 phone extensions in this site and use SRST for Survillance. I appreciate your help and support to answer this questions. Thanks in advance.

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Hall of Fame Super Gold

I think you can only install

I think you can only install CUE into an SRE.  

When you said that you think

When you said that you think that we can only instal Cisco Unity Express into a Service-Ready Module, It confirms that we can not install Call Manager Express in this module, correct?

The thing here is that we need to confirm if we should buy this module (ISM) to install Call Manager Express in the Cisco Router 2901, I don´t think so because what I found in cisco documentation is that this module is to improve and increase the performance of the Cisco Router for some specific things about performance but I didn´t find any documentation that confirms that this is a REQUIREMENT to install Cisco Call Manager Express :) ... 

 

I really appreciate your answers. Good day! 

Hall of Fame Super Gold

Well, I got a 2951 router

Well, I got a 2951 router with an SRE-700 and the "most" or "highest" we can install is CUE.  

The thing here is that I need

The thing here is that I need to confirm if I should buy the ISM module or not to install Cisco Call Manager Express in the Cisco Router 2901, or in the case I don´t buy this module the Cisco Call Manager Express  is going to run without any issues.

Thanks in advance for your help :).

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