I am struggling to shorten the Call Waiting Tone length on a Cisco SPA514g, running sofware ver. 7.5.3, hardware ver 1.0.0.
I am using the Metaswitch SIP Provisioning server to send a custom config fragment <Call_Waiting_Tone>440@-5;1(.1/.1/1)</Call_Waiting_Tone> to the phone.
I have verified via the phone ui that the value is successfully entered in the "Call Waiting Tone" field under the "Regional" tab. The tone length never changes. I can remove it altogether, but not affect the -db levels or the length.
I've recently ran into this issue also. I found it happens whenever I set my remote media gateway model to anything other then the default ringtone I get the extremely long CW beep. When I set it to the default Cisco Synth tone the tone follows the config UI you stated above.