We currently use Avaya 4621 phones with our IP Office phone system. I noticed on Avaya's web site that the 4600 series phones are no longer listed under their list of phones, The 5600 series phones are listed, however. Are the 5600 series phones a replacement for the 4600 series? What are the differences between the 4621 and 5621 phone models?
Thanks.
V/
Thanks.
V/