Cisco 9971 - Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager

Table 16: Cisco Unified IP Phones and Supported KEMs
Supported KEMsCisco Unified IP Phone model
3 KEMs with 108 lines or buttons9971
2 KEMs with 72 lines or buttons9951
1 KEM with 36 lines or buttons8961
Related Topics
Wall Mounts, on page 125
KEM Power Information
The Cisco Unified IP Color Key Expansion Module for the Cisco Unified IP Phone 8961, 9951, and 9971
possesses the following power consumption and power scheme:
Power consumption
48V DC, 5W per KEM
Power scheme
•
If the Cisco Unified IP Phone 8961, 9951, and 9971 uses AT PoE, at least one KEM can be
powered up.
•
If the phone uses a power adapter, three KEMs can be powered up for the Cisco Unified IP Phone
9971, two KEMs can be powered up for the Cisco Unified IP Phone 9951, and one KEM can be
powered up for the Cisco Unified IP Phone 8961.
•
If the Cisco Unified IP Phone 8961, 9951, and 9971 uses AF PoE, a KEM cannot be powered up.
•
With AT power, the Cisco Unified IP Phones 9951 and 9971 can support two KEMs plus a USB
headset or another USB device that is independently powered and only uses USB for signalling.
•
The Cisco Unified IP Phone 9971 needs a power cube to support three KEMS.
•
With AF power, the Cisco Unified IP Phones 9951 and 9971 need power cubes for any KEMS.
The Cisco Unified IP Phone 8961 can support one KEM with CDP, AF power, and no power
cube.
Connect Single KEM to Cisco Unified IP Phone
To connect a single KEM to the Cisco Unified IP Phone, follow these steps:
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager
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KEM Power Information