Re: Cisco IP phone 7961: Not able to take call through handset
Just to add a note to the info from Paolo. This is almost surely a Firmware issue. This bug (below) manifested itself in exactly the same way you have experienced for our 3rd generation phones. 7941's and 7961's both had this type of random problem until the 8.2.x Firmware. The bug lists the problem as Answering calls only, but as I say we also had the same Dialing then "hang up" issues;
Looks like this Firmware bug continues to plague IP Phones;
Rarely a 7900 IP phone will get into a state where the speaker, headset, handset, or line buttons will not work to take the phone offhook. In this state the only way to go offhook will be to use the softkeys.
This has been seen in various Skinny phone loads up to and including 7.0(2)SR1. It is not dependant on CallManager version.
A simple IP phone reset will recover the phone.
Further Problem Description:
The root cause of this issue is not known at this time.
This problem will be further addressed in the 8.0 Skinny loads by adding more debugging to the IP phone console. If you suspect you have an IP phone in this state running an 8.0 load please do not reset the phone and contact TAC immediately.
This could also be a hardware problem with the Hookswitch. After deploying Cisco IP Phones for the last few years we (and many others) have found this to be the most common hardware problem. There is a "Best Practice" for cleaning the Hookswitch contacts (link below) that does work on occasion. Usually the phone has to be replaced/RMA'd.
Best?? Practices for Cleaning and Troubleshooting Cisco IP Phone Hookswitch
You have reached the Cisco Logistics Support Center.. To Check Status of
your RMA, visit Product Returns & Replacements (RMA). Need help? Contact
us by Phone or Email. North Americas Phone: 1800 553 2447 Option 4
Email: email@example.com Europe Phone: +3...
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...