Avaya EU24 Expansion Module (mpn700203656)
The Avaya EU24 Expansion Modules for IP Office delivers performance-boosting features. The EU24 is an add on unit. The EU24 Expansion Module is an optional device that extends the number of call appearances and feature buttons available on the telephone. The EU24 Expansion Module is compatible with 2420, 4620, 5420, and the 5620 phones.
** IP Office Power Supply 1151C1 ( Required ) sold here