There are cases/situations where we have to configure custome CPTONE to resolve FXO disconnect issue. Following are situations which can arise due to FXO disconnect issue:
Phone A calls Phone B, Phone B does not answer. Phone A then goes on-hook but Phone B keeps on ringing.
FXO ports remains busy/off-hook even if the call has been cleared.
So, to resolve FXO disconnect issue we can configure custome CPTONE. Cisco router’s have CPTONE which can be applied on FXO ports based on the country (standard countries, e.g.: US, UK, INDIA). But for countries other than standard countries, where TELCO uses different frequencies to send the calls, we have to configure custome CPTONE.
Please refer to the attached document which contains steps to configure custom CPTONE using Cool EditPro software.
... View more