As I am fimilar with many Cisco devices, I am trying to gather a few specific details regarding the UC560 system that we are planning to implement in our office.
We already have Cisco phones (SPA504G).
We want to use a SIP connection instead of PTSN or PRI.
We have a remote office. We do not want to install another UC560, my understanding is we are only allowed 5 phones at the remote office? The only way to have more is by purchasing another UC560 and running in multisite mode, correct?
Sometimes people take their phones home and work from home. My understanding is the phones require either a site-to-site VPN connection to the UC560 or use of an SPA525G phone that has built in VPN capability. Is that accurate? In our current system we are able to take the phone home and it works as long as we have internet access, I assume that would not be possible without what I mentioned before?
That's all for now, thanks!
There is a limitation on the UC500 on the amount of simultaneous tunnels. However, with a site to site VPN you should be able to register as many phones as you have licenses for. There is no 5 phone limit for a remote office. So all you would need is a device than can do IPSEC on the remote side and you should be good to go.
If you want to work from home you can either have SPA525 phones with built in SSL VPN, CIPC with a VPN tunnel to the UC, or any other phone type with a site to site tunnel connected.
Let me know if you have further questions.