The FAQ below states that if you have a server with SAU and you are replacing it with the same type of server, you can use PUT to request the CDs. According to the updrade and migration guide, the 7750 is considered a 7825 class server. So, if you're moving to another 7825 class server, you should be able to use PUT. Otherwise, you would need to use the Product IDs referenced in the document that corresponds to your upgrade scenario.
The Unity part is pretty straight forward (see below). The CCM part ....no so much. Have a careful read of the FAQ doc and you will see that if the parts are not the exact same that there is an upgrade cost.
Planning for the Cisco CallManager Migration
You can use the Cisco CallManager Server Upgrade and Migration Program to purchase Cisco CallManager at a discount. To determine the discount, the SPE310 is equivalent to a MCS-7825. Consult with your local Cisco sales team for assistance with this program.
The new server replaces the same type of server in an existing cluster.
If the customer has a Cisco Software Application Support Plus Upgrades (SASU) contract, refer them to the Product Upgrade Tool (PUT) ( registered customers only) .
If the CDs are not offered through the PUT tool, then use the RMA replacement CDs. Refer to Cisco 7800 Series Media Convergence Servers for Cisco CallManager required part numbers. All Cisco CallManager part numbers include the required operating system and other included foundational software (Microsoft SQL Server, DC Directory, and so forth.).
****The new server is an addition to the current cluster or an upgraded server. Inform the customer that there is a cost associated with this and the appropriate software must be ordered. Customer documentation for this situation is in the Cisco CallManager Server Upgrade Program documentation****.
How do I get the latest full version CDs of a specific product?
A. Refer the customer to the Product Upgrade Tool (PUT) ( registered customers only) .
The customer is required to enter their Cisco Software Application Support Plus Upgrades (SASU) contract number and request the CD/CD set. If the customer does not have a SASU contract, they must purchase the upgrade from Cisco Sales.****
See the Product Upgrade Tool section for further details.
Prior to migrating a Cisco Unity system to a new platform, the Unity user licenses need to be transferred from the Cisco ICS 7750 system to the new MCS system. To transfer the licenses, you need to send an e-mail message to firstname.lastname@example.org with the following information:
E-mail address for receiving new licenses
MAC address of the SPE in the Cisco ICS 7750 that runs Cisco Unity
MAC address of the new MCS server for Cisco Unity
Description of the reason for switching Cisco Unity licenses
After receiving this information, the licensing team deactivates the licenses associated with the Cisco ICS 7750 and reissues licenses for the new MCS server.
Both from this doc;
Migrating a Cisco ICS 7750 System to a Media Convergence Server (MCS)
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