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Item#: 9SIA36Z2CS6070

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

  • 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
  • Wired VoIP

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the Cisco Small Business SPA508G


Cisco Small Business


Wired VoIP


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
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
Pixel Based Display: 128x64 Monochrome LCD Graphical Display with back light
Speakerphone On/Off Button with LED
Headset On/Off Button with LED
Mute Button with LED
Message Waiting Indicator LED
8.43" x 8.35" x 1.73"
1.9 lbs.
0ºC to 40ºC
5 to 95% Non-condensing, operating and non-operating


Four Way Rocking Directional Knob for Menu Navigation
Voice Mail Message Waiting Indicator Light
Voice Mail Message Retrieval Button
Dedicated Hold Button
Settings Button for Access to Feature, Set-up, and Configuration Menus
Volume Control Rocking Up/Down Knob Controls Handset, Headset, Speaker, Ringer
Standard 12-Button Dialing Pad
High Quality Handset and Cradle
Built-In High Quality Microphone and Speaker
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details

Customer Reviews of the Cisco Small Business SPA508G

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  • Bruce J.
  • 3/19/2013 10:38:36 AM
  • Ownership: more than 1 year
  • Verified Owner

5 out of 5 eggsSPA508G - firmware upgrade = great phone

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?

You don't need a seperate RJ45 outlet/jack to run these phones at workstations. The phone plugs into the wall, and the desktops plug into the 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.

Other Thoughts: 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. Businesses need their handsets at all times and shouldn't be required to keep extras on hand for support purposes.

1 out of 1 people found this review helpful. Did you? Yes No

  • Peter I.
  • 9/24/2012 8:31:12 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGreat IP Phones

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.

Other Thoughts: 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. Also whenever I accessed the web GUI it would just reset the phone preventing me from being able to change any settings. I think it was just a defective phone. Newegg already has my replacement on the way.

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  • Zach J.
  • 3/9/2011 7:59:08 AM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsAmazing desktop SIP phones

Pros: - Superior build quality
- Individually lit buttons
- Back-lit
- Tons of configuration options
- Web GUI
- PC pass through
- Headset options

Cons: - They removed the notification LED from the handset and moved it to the top of the base
- Stand is static, no angle adjustment

Other Thoughts: Always have loved these SPA phones. They stand the test of time and they seem to just get better every revision.

Manufacturer Response:

Hi z33k3r!

Thank you for the positive comments. We appreciate your feedback and are happy to hear you are satisfied with your SPA IP Phone!

Cisco Small Business Team

Did you find this review helpful? Yes No

  • Stephen S.
  • 7/9/2010 12:16:28 PM
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsgreat phone

Pros: Amazing speakerphone, decent number of extensions, works with asterisk, configuration web page is upgraded from older models (SPA94x). Overall, it is a very good phone.

Cons: Semi-pricey but it is definitely worth it.

Other Thoughts: If you care about voice quality and want a proper speaker phone, buy the SPA50X models. If you want the cheapest VOIP phone possible, get the SPA94X series.

Manufacturer Response:


Thank you for feedback. We appreciate the positive feedback and are happy to hear you are satisfied with your IP phone.

Thank You,

Diana Cisco Small Business Team

Did you find this review helpful? Yes No

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