Excerpt: Have purchased 4 of these phones from B&H now. Great sound quality and easy to use. Originaly provisioned for Ring Central, and now working with Jive Communications, these are great for virtual phone systems - even on a fiber or cable internet connection. Just remember they are POE, so unless you have a Power over Ethernet switch you will need to purchase an AC adaptor.
Summary: If you want to brick one of these phones, simply try to upgrade the firmware by following the instructions to the "T". Once a phone is bricked, there is no sequence of buttons to press that will recover the original factory settings and Cisco will offer no support for a bricked phone after the warranty expires. Even if it were under warranty, I suspect it would need to be mailed off to Cisco which in my opinion is unacceptable.
Pros: Reliable. Great sound. Works with Asterisk. Works with 3rd party headsets. PoE. PC Ethernet Port. Web Interface. What more could you really want from a simple desktop SIP phone?
Cons: Desktop loses LAN/network connectivity when plugged into the PC port and phone reboots. The web interface could use some improvement but it's still pretty good. Just don't try to upgrade the firmware. Ever. See other thoughts.
Summary: I ordered 4 of these and had to RMA one of them. The one I had to RMA got stuck on the initializing configuration screen after a few days of use. Since it never got past that screen, there was no way to hard reset the phone back to default settings. I tried issuing it a different DHCP IP address in my router and tried plugging it into different ports and switches.
Pros: Good sound quality, nice web GUI, good speakerphone, Power over Ethernet, and plenty of other features. They work great with 3CX phone system that I setup.
Cons: No way to hard reset the phone besides software buttons.
Excerpt: CISCO SPA 508G Questo telefono è stato studiato, per essere utilizzato in casa, o in ufficio. Si tratta di un telefono da tavolo, con un'ampio display lcd con retroilluminazione. Il telefono supporta gli standard di risposta automatica, avviso di ...
Pros: voip/ottima ricezione vocale anche in viva voce