Using an external FTP/SFTP server the Vyopta data collector can behave as if it were a billing processor, and the CUCM can therefore be configured to send its CDR records directly to the collector rather than have the collector poll for them via the API.
Up to three billing servers can be configured on each CUCM. Should the three already be in use then the Vyopta Data Collector can be configured into the CUCM and can, in turn, forward the received CDR files to a further system.
Push based CDR collection requires the installation of a third party SFTP server application on the Vyopta data collector server. Several options are available and an example of configuring the open-source FreeFTPd server is detailed here: https://support.vyopta.com/hc/en-us/articles/360008437873-Vyopta-Monitoring-SFTP-Step-by-Step-Instructions
And for the Solarwinds Free SFTP server:
Enabling Push Based CDR Collection
There are several steps required to configure push-based collection.
1. Add the Billing Server to the CUCM
To configure the data collector as a billing server, login in to the CUCM and select Cisco Unified Serviceability from the navigation drop-down menu in the top right, and navigate to Tools -> CDR Management
In the screen that is shown, locate Billing Application Server Parameters and click on the Add New beneath this section
The following form will be presented, and should be populated with the appropriate parameters for your SFTP server
Replace the Directory Path with a CUCM specific directory if more than one CUCM is used, and ensure that this directory is created under the SFTP default directory on the collector machine.
Click on Add to provision the server.
2. Testing CDR Send
A test call should be placed between endpoints registered on the CUCM then after ending the call, verify that the file is sent to the SFTP directory on the server.
In the event of trouble, please consult the logs on the CUCM for further information.
3. Disable Collection for the CUCM
Once CDR collection is verified, we need to disable collection for the CUCM Pubs that you are setting up to use push-based CDR collection:
Go to the Vyopta Admin portal via your login menu in the CPM tools or directly at https://my.vyopta.com/admin
Search for the CUCM Pub to be modified and click the edit button or the system name.
Disable the CUCM infrastructure by clicking the Enabled button at the top of the page.
4. Configure Vyopta for Push CDRs for the CUCM
Scroll down to the "CDR File Collection (common for all CUCM systems)" menu and expand it. Here you check the "Use push-based CDR collection?" box and then Save:
Note: Push based CDR collection must be used by all of the CUCM Pubs in Vyopta, so the billing server must be set up on all of the Pubs prior to re-enabling collection for CUCM.
If all three billing servers were already occupied on any of the CUCM Pubs, then it is necessary to use one of the billing server slots for Vyopta and then have Vyopta forward the collected CDRs to the billing server that was replaced. For this, configure the collector to forward the CDR files onward to this server by expanding the Forward menu and entering the FTP configuration used by the original billing server:
5. Re-enable Collection for the CUCM
Finally, scroll back to the top of the Vyopta CUCM configuration page and Enable the system. Successful upload of files can be observed on the server by opening the SFTP directory setup for collecting the CDR files. Files should be seen briefly as they are collected and cleared as they are successfully uploaded to Vyopta. By default, this is done every 10 minutes, but can be adjusted as needed.