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 realize in eight years, a lot has changed . . . .
Still, I was able to complete Lab 3. However Lab 4 is the introduction to the Cisco Configuration Professional - which I was able to locate and download. That didn't do me much good as it requires Adobe flash which has been discontinued . . . .
To learn this technology, I bought off of Ebay a "VoIP lab" which is a Cisco 2911 router and three switches that have PoE. I have the router set up with three VLANS (Data, Phone and Management) and a DHCP server. I am able to get an IP address on the phone and a workstation. I can telnet to the three subinterfaces.
And that is as far as I have gotten.
I work as a printer / desktop / laptop field service tech so I service businesses that use VoIP or SIP phones - almost exclusively Cisco.
So my first question is where can I get 'real' on-line training as there is no on site location in Mobile and even if there was, it would likely be during the day . . .
My second question is what management programs / software do these businesses use to manage their SIP phones?
My last question is do businesses have in-house personnel or use outside vendors? One large bank we service uses Black Box (I think).
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