Cisco 9800 series KEM

The Cisco Desk Phone 9800 Key Expansion Module (KEM) enhances the phone by providing additional extension lines and programmable buttons. These buttons can be configured as line keys, speed-dial buttons, or other supported phone feature buttons. The Cisco Desk Phone 9800 Key Expansion Module (KEM) supports 40 lines, with two pages of 20 buttons each. You can use more than one expansion module per phone on the 9861 and 9871 models. But each module must be the same type. The following table lists the phones and the number of key expansion modules that each model supports.