Question 1

Does this product include an AC power supply?

Accepted Answer

The simple answer is no....
The handset can be powered with Power Over Ethernet, or an optional wall-wart power supply which is also available through Newegg.

Question 2

Does this unit include the power supply adapter?

Accepted Answer

No you have to purchase them separately.  I made the same mistake and ordered them not realizing this.  These also work with Power Over Ethernet POE so Cisco did not bundle a power adapter.

Question 3

I want to change the title of the station on the phone. For example, it says MANUFACTURING DEPT on the screen savor. How do i change it?

Accepted Answer

This is an interesting question.
I am not sure what you mean by "screen savor"
If you bought the phone new, I believe there should be nothing there.
Generally speaking, the phone is populated with information from the IP service provider when you assign the phone to your provider.  This is where the phone user, phone #, and other information in the phone come from.  This is where you would change the info.
alternatively - you can go to the phone control panel by typing in the IP address of the phone from a browser (assuming the computer is on the same network).
You can find the IP address by pressing the menu button and then 9.  There are many options inside the phone control panel for managing the phone.

Good luck

Brand	Cisco Small Business
Model	SPA508G

Protocols	TCP/IP
Security	Password Protected System, Preset to Factory Default Password Protected Access to Administrator and User Level Features HTTPS with Factory Installed Client Certificate HTTP Digest - Encrypted Authentication via MD5 (RFC 1321) Up to 256-bit AES Encryption
Ports	2 100baseT RJ-45 Ethernet Ports (IEEE 802.3, including 802.3af) Handset: RJ-9 Connector Built-in Speakerphone and Microphone Headset 2.5 mm Port
Display	Pixel Based Display: 128x64 Monochrome LCD Graphical Display with back light
LEDs	Speakerphone On/Off Button with LED Headset On/Off Button with LED Mute Button with LED Message Waiting Indicator LED
Dimensions	8.43" x 8.35" x 1.73"
Weight	1.9 lbs.
Temperature	0ºC to 40ºC
Humidity	5 to 95% Non-condensing, operating and non-operating

Cisco Small Business SPA508G 8 Line IP Phone With Display, PoE and PC Port

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Item#: N82E16833150070