well I am making use of Canon Pixma MX300. If I am having fax on the device and phone call is coming within half of the time. At the same time I am talking on phone for around a minute then fax machine is interrupting the call. As it kicks I wont be able to shut down the cannon until and unless In Use Memory light simply stops the flashing takes for 30 seconds. In that particular time I am not able to make any phone call on the device. Let me know if you know anything to resolve the issue.
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