The phone's configuration must be unlocked in order for that key sequence to actually have an effect. The key sequence to unlock the phone is **#, however to avoid resetting the phone and still enable the tone, I would recommend pressing:
Then place a call, and once answered, double-tap the i button or ? button (depending on the age of your phone). You should then have the Tone softkey as an option, which will send out 1004Hz tone at -15dB.
NOTE: Once you start the tone, you can only terminate it by ending the call.
I have another question, in that article it mentioned to make a call to a loopback number. How can I create a loopback phone number on the voice GW?
Following is what I copied from that article.
Use the IOS command show call active voice to look at the input and output levels for your call. The following is a call to a loopback number that just echos back whatever we send with no attenuationUse the IOS command show call active voice to look at the input and output levels for your call. The following is a call to a loopback number that just echos back whatever we send with no attenuation
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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 ...