Cisco Licencing

Unanswered Question
Feb 2nd, 2009


Can some one tell me whether Third party non cisco IP Phones will accept Device Licenses for its registration.

I have this problem too.
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rob.huffman Mon, 02/02/2009 - 05:26

Hi Karthik,

Yes, these 3rd party devices will use the requisite DLU's for registration :)

Device licenses are required for Cisco devices and for third-party devices,*** with the flexibility to replace third-party devices with Cisco devices. Device licenses are sold in increments of device-license units (DLU's). Device-license units are assigned to each device connected to Cisco Unified CallManager. Each device is assigned a unit number based on the type and capabilities of the device. Devices with more complex and high-end capabilities are assigned a higher number of units compared to devices with basic capabilities,

From this good Q & A doc;


Application and phone software licenses are enforced. The system manages the maximum number of devices that can be provisioned.

• Each device (Cisco Unified IP phones, third-party devices, and video devices) provisioned in the system corresponds to a number of device license units (DLUs), depending on its capabilities; the total number of units is managed in Cisco Unified CallManager to determine capacity.

• DLUs must be purchased to cover the number of devices connected to Cisco Unified CallManager.

• Third-party SIP devices require DLUs for operation with Cisco Unified CallManager.

Third-party SIP device (basic)

3 (third-party)

Third-party SIP device (advanced)

6 (third-party)

Hope this helps!



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