I am working on my Cisco VoIP and when I followed the lab instructions to create a username and password to login to a Cisco 7945, when I attempted to login, I found out I needed Cisco Unified Presence. Is this just "software" I can install on the Ci...

I bought a Cisco VoIP lab that came with two 7945 phones.  I then bought an additional lot of six more 7945 phones.  The first two and four of the second six all work with no problems.  However, two of the additional six fail when downloading the fir...

I completed my CCNA in November 2019 and am now starting to try to learn Cisco VoIP or SIP.  I have bought the Official Cisco CCNA Voice Lab Manual and the textbook, CCID.  Both are from 2013 as I have been unable to find anything more recent.  And I...