The Cisco CP-SINGLEFOOTSTAND is the necessary stand for adding 1 CP-7914, CP-7915, or CP-7916 expansion module to your Cisco CP-79xx IP phone.

The Cisco CP-BATT-7921G-EXT is the extended performance Lithium Ion replacement battery for the Cisco CP-7921 WiFi phone.

The Cisco Unified IP Charcoal Color Key Expansion Module extends the capabilities of the Cisco Unified IP Phone 9971, 9951, and 8961 models with additional buttons and a color LCD display.

Footstand for Unified IP Phone 79xx (CP-7900-REP-FOOT1= )

Cisco IP Phone Wall Mount Kit

Locking wall mount kit for 7900 phones

The Cisco SPA500S is a 32 button expansion module for use with the Cisco SPA500 series of VoIP phones.

Cisco CP-BEKEM= Cisco Key Expansion Module for Cisco IP Phone 8800 Series

Cisco™ CP-MCHGR-8821-BUN Multi Charger Bundle for 8821 IP Phone

The Cisco IP Phone 8800 Key Expansion Module extends the capabilities of Cisco IP Phone 8851, 8861, and 8865 models with additional buttons and a color LCD display. This key expansion module adds 18 physical keys with access to 18 additional keys, using the page keys, for a total of 36 additional keys. You can connect up to three 8800 KEMs to the IP Phone 8861 and 8865, and up to two 8800 KEMs to the IP Phone 8851.