Cisco 521 User Manual page 9

Your Headset
Table 3: Compatible Cisco Call Devices
Call Device
Cisco IP Phone 6841 and 6851
Cisco IP Phone 7821, 7841, 7861,
7945G, 7965G, 7975G, 8811, 8841,
and 8845
Cisco IP Phone 8851, 8851NR, 8861,
8865, and 8865NR
Cisco Webex DX70 and Cisco DX80
Cisco Jabber for Windows and Mac
Cisco Webex Meetings for Windows
and Mac
Your adapter is used for basic call features.
Figure 2: Cisco Headset 531 and 532 Controller
Connection Minimum Software Requirement
RJ9 No minimum firmware required for RJ9 connection
RJ9 No minimum firmware required for RJ9 connection
RJ9 or USB No minimum firmware required for RJ9 connection
On-Premises Firmware 12.1(1)SR1 or later (USB
only)
Multiplatform Firmware 11.1.2 or later (USB only)
USB Cisco Webex DX Firmware 9.3 or later
USB Cisco Jabber version 12.0 or later
USB Latest version of Cisco Webex Meetings
Cisco Headset 500 Series User Guide
Cisco Headset 530 Series
3