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Why is my Cisco IP Phone resetting?
If your Cisco IP Phone is resetting because it loses contact with the Cisco Unified Communications Manager software, this may be due to a network connectivity disruption. Check for cable breaks, switch outages, and switch reboots.
What to do if Cisco 8961 IP Phone does not start?
If your Cisco Unified IP Phone is not going through the normal startup process, verify that the network port is functional and that the phone is receiving power. If the phone still does not start up properly, power up the phone with the handset off-hook to launch a backup software image. As a last resort, perform a factory reset.
Why Cisco 8961 IP Phone cannot obtain a DHCP-assigned IP address?
If your Cisco IP Phone cannot obtain a DHCP-assigned IP address, this may indicate that 802.1X authentication is enabled but the phone is unable to authenticate. Verify that you have properly configured the required components and confirm that the shared secret is configured on the phone.
What to do if Cisco 8961 cannot obtain a DHCP-assigned IP address after factory reset?
If your Cisco IP Phone cannot obtain a DHCP-assigned IP address, it might be because the phone has completed a factory reset while 802.1X was enabled. To resolve this, temporarily move the phone to a network environment that is not using 802.1X authentication.
How to fix display issues on Cisco 8961 IP Phone?
If your Cisco IP Phone display appears to have rolling lines or a wavy pattern, move the phone away from the lights or try replacing the lights.
Why Cisco 8961 does not register with Cisco Unified Communications Manager?
If the Cisco IP Phone does not register with Cisco Unified Communications Manager, the CTL file may not contain the correct information for the Cisco Unified Communications Manager server.
Why do I have no video on my Cisco 8961?
If your Cisco Unified IP Phone 8961, 9951, or 9971 displays no video or a black video screen, verify that video is enabled in the Cisco Unified CM. Note that these phones do not display videos with a resolution higher than VGA.
How to fix frozen video on Cisco 8961 IP Phone?
If your Cisco IP Phone has frozen video because the phone stops receiving video packets, try to hold and then resume the call to clear the issue.
General| Resolution | 640 x 480 pixels |
|---|---|
| Display | 5-inch TFT color display |
| Ethernet | 10/100/1000 Mbps |
| Power | IEEE 802.3af Power over Ethernet (PoE) Class 3 |
| Connectivity | Two-port Gigabit Ethernet switch |
| Buttons | 4 softkeys |
| USB Port | Yes, supports USB 2.0 |
| Headset Jack | Yes, dedicated headset port |
| Speakerphone | Full-duplex speakerphone |
| Codec Support | G.711, G.722, G.729, iLBC |
| Security | 802.1X authentication, TLS, SRTP, HTTPS |
