Central call recording method utilizing RTP forking in Cisco environment

This Verba recording method utilizes special features of the Cisco Unified Communication Manager introduced in version 6.0. It integrates call recording and silent monitoring features into CUCM.

If an extension is configured for recording (the configuration is available in the CUCM), the CUCM instructs the phone to send the RTP streams related to a given call, directly to the recording server utilizing the built-in bridge of the phone. The recording system is connected to the CUCM via a SIP trunk to capture the signaling messages. Additional call detail information is obtained by using a JTAPI interface.

With Verba you can also use this technology for silent monitoring, without call recording.

Click on the image to view it in larger size

Supported platforms

Supported Cisco Unified Communications Manager versions

6.x, 7.x, 8.x, 9.x and 10.x

Supported Cisco Unified Communications Manager Business Edition versions

6000: 8.x, 9.x and 10.x

5000: 6.x, 7.x, 8.x and 9.x

Supported Cisco Unified Contact Center Enterprise versions

All versions compatible with the above listed CUCM versions

Supported Cisco Unified Contact Center Enterprise versions

All versions compatible with the above listed CUCM versions

Platforms NOT supported

For recording on these platforms, see the passive recording solution

Cisco Unified Communications 300

Cisco Unified Communications 500

Cisco Unified Communications Manager Express

Cisco Unified Communications Manager Business Edition 3000

Supported Cisco IP phones (certain phones are only supported with the latest CUCM versions)

Check the Knowledge Base


  • In a multi-site network, branches where few calls have to be recorded, the deployment of a recorder does not require a dedicated recording server for each remote site.
  • Theoretically this recorder eliminates the complexity of the switching infrastructure compared to the passive recording method, because the RTP streams are sent directly to the recording server automatically.
  • Can be easily scaled by adding new recorders to the system if more capacity is required.
  • Does not require extra DSP resources from the network compared to the active (conference based) method.
  • Recording tone can be generated by the phone.
  • Encrypted calls can be recorded since CUCM 8.0


  • Requires additional bandwidth on the network to the recording server(s).
  • Since the recording functionality is controlled by the CUCM, in case of a WAN link failure, the recording will not work at all in the branch offices (if the CUCM is in the central site).
  • Cisco SRST (Survivable Remote Site Telephony) does not support native recording.
  • Requires at least CUCM version 6.0.
  • Does not support all phone types (check the list above)
  • Requires extra capacity from the CUCM server(s) (each recording session adds 2 calls to the Busy Hour Call Completed (BHCC)).
  • Only voice calls are supported.


Cisco Compatible

Verba Recording System is a Cisco Compatible solutionVerba Recording System is Cisco Compatible.

Verified by Cisco Systems through the rigorous Interoperability and Verification Testing (IVT).

More info


Copyright © 2017 Verba Technologies, LLC. All rights reserved.