Avaya Business Phone System Manual 5420

This guide covers the use of the Avaya 5420 telephone, running in Key and Lamp mode, on Avaya IP Office telephone systems operating with Level 3.0 software and the 5420 telephone’s software running at REL:4.00 or higher.

Avaya Business Phone System Manual 5420

Have Questions? Contact Us.

Just complete the adjacent form and we'll be in touch!  Or if you'd prefer to speak with one of our experts immediately, please feel free to give us a ring directly.


"*" indicates required fields

Business Address*
This field is for validation purposes and should be left unchanged.