shodown wrote: »
Only get into voice if you like it. This is not like the other fields. Voice is by far the hardest of all the things to learn. It took me 5 months to get my CCNP, and almost 4 years go get my CCNP V. CCNA voice is just for admining systems that are already up. Since you are focusing on small businesses get the older CCNA Voice book. It covers the UC500 series very well. Also get the older call manager express unity express book. Even though those 2 books are older they will give you a good idea of how to get voice deployments up and running.
shodown wrote: »
Right now voice is great. We are close to the majority of companies being on a VOIP system. The good things is that people who purchased VOIP a long time ago are looking for upgrades as they would from AD2003-2008 and so on. There is always going to be some sort of VOIP, but it can all be blown away in a second. The good thing about voice is that it relies on good foundational enterprise routing/switching and security. So even if it disappeared you will have something to fall back on. With it becoming virtualized we are doing a lot of VMware data center work within the voice scope as well.
luberguilarte wrote: »
Dmarcisco, Powering the phone from a different source will not prevent it from getting the files and configurations from the tftp server, the reset command from the CLI all it does is a soft reboot of the phone, meaning that they will keep all the current configurations, the only way you can factory reset a phone is manually applying these digit sequence as follow:
hold # for couple of seconds until the buttons start flashing, then press 1,2,3,4,5,6,7,8,*,0,#. that will boot it to factory reset, but aging , if there's any existing configuration for that device like ephone and ephone-dn plus all the files statements under the tftp-server and the load for that device type under Telephony-service, your phone will get the configurations and will register with your call processor again.