[CP-7915] Cisco Unified IP Phone Expansion Module

12 physical keys, 2 pages for 24 additional lines
Page 1 and page 2 key
Monochrome, non-backlit
Green/Red/Amber LED status lights
Maximum 2 modules can be used per base phone
Additional footstand is required.
Cisco Double Footstand for use with 2 expansion modules
Cisco Single Footstand for use with 1 expansion modules