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Bypass CUCM or Cisco Unity Connection hardware check

Hacking or Bypassing Hardware Check for UC Applications like CUCM, CUC, IM&P, UCCX.

Sometimes when you setup your own lab at your home and you have limited hardware resources, it gets difficult to install UC application, specially Cisco Unity Connection. You will not get an options to install Cisco Unity Connection until and unless the hardware requirements are met i.e., Cisco Unity Connection needs minimum of 4GB RAM and 160GB HDD (as per virtualization requirements).

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In such cases, we can tweak the installation in such a way that it would bypass the hardware check for Cisco Unified Communications Manager or Cisco Unity Connection.

Prerequisites for Bypassing Hardware Check:

In our example, we are going to see how to tweak / bypass Cisco Unity Connection hardware check. To do so, you need to have the following files ready.

  1. Notepad ++ file installed in your system
  2. PowerISO or alternative to PowerISO installed in your system. If you are using PowerISO, make sure it is full version.
  3. Cisco Unified Communications Manager Bootable ISO file. We will be using UCSInstall_UCOS_9.0.1.10000-37.iso file for testing purpose.

Locating the file callmanager_product.conf in the ISO Image using PowerISO:

Let’s get started:

  1. Open the UCSInstall_UCOS_9.0.1.10000-37.iso file using PowerISO.uccollabing.com
  2. Navigate to the path /Cisco/install/confuccollabing.com
  3. Right click callmanager_product.conf and click Extract To…uccollabing.com
    Choose a location where you want to extract this file. In our case, we have selected Desktop

    Modifying the file callmanager_product.conf using Notepad++:

  4. Right click “callmanager_product” and select Edit with Notepad++
  5. If you would like to bypass the hardware for your Call Manager installation, you can search  id=”callmanager”uccollabing.com
  6. Change the Value from NOT, to VAL. See below:NOT, VMware, *, *, 2047, *, *, *, *, *    –>> Change it to
    VAL, VMware, *, *, 1024, *, *, *, *, *    –> > Change to this valueuccollabing.com
  7. If you would like to bypass the hardware for your Cisco Unity Connection installation, you can search  id=”connection” 
  8. Change the Value from NOT, to VAL. See below:NOT, VMware, *, *, *, *, *, *, *, *
    VAL, VMware, *, *, *, *, *, *, *, *uccollabing.com
  9. Save the callmanager_product.conf file

    Replacing the existing callmanager_product.conf file in the ISO and Save the file:

  10. Delete callmanager_product.conf from the ISO file and replace callmanager_product.conf with the one you just modified.uccollabing.com
    Replace : Drag and drop the file (the one you modified just now) :uccollabing.com
  11. Click on File > Saveuccollabing.com

    Load the modified ISO file in your Virtual Machine and boot your UC Application:

  12. Now you can use this ISO file to boot your Cisco Unified Communications Manager or Cisco Unity Connection with your limited hardware resource.uccollabing.com

Hope this helps!

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Claudio Quiroz Cabello

Electrical Engineer CCNA Collaboration CCNA Voice CCNA R&S. I'm Electrical Engineer and I work like Support Engineer for a Telephony Service Provider Company. Before that I had position like Pre-Sale Engineer about small and medium multivendor telephony solutions. I have 5 years of experience working in Telephony Multivendor Projects. I am also 3 years of experience working in Support and implementation about Cisco Collaboration platforms: UCS server, UCM, Cisco Unity, Presence Server, Jabber, Gateway. Support Community is most useful in finding design, implementation and support tricks and shortcuts that greatly help me in my daily activities. If you need to contact me, please you can writte me.

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Kanishka Singh

CCNA Routing and Switching
Am a technology enthusiast. Having 1. 9+ years of experience in the domain. I work in network support providing support with implementation, maintaining and precisely troubleshooting the infra.
Realm of collaboration makes me want to learn and face new challenges more and more.

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