Being so happy that i finally managed to make my C2600 with FXO-M2 ports understand the disconnect tone of China Telecoms/China Mobile I would like to help others also.
Unfortunately cptone cn never worked for me correctly, letting the hook off whenever a placed had been terminated from the pstn side of the loop. Meaning whenever a pstn callee was dialing my china telecom numbers and my internal Asterisk was replying (with IVR or whatever) the line would remain open forever unless
1. the line had been answered and terminated from any internal user
2. the whole voice interface would be reset by me
Trying with a custom-cptone seems that everything works fine now.
Here are my settings
supervisory disconnect dualtone mid-call
supervisory custom-cptone LAND
timeouts wait-release 1
!In China there is no actualdual tone. Disconnect tone is transmitted every 350ms on 450Hz for landlines (China Telecom) and every 500ms on 425Hz on GSM (China Mobile)
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