This isnt a real phone. It is just a DN & a TN. There is nothing to forward. It looks like for 4 rings, not one though. Wouldnt it be 19 cfw 1 4300? I tried the 19 cfw 4 4300 and I got sch 0356 error.
If it is not a real phone, then out the phone, and rebuild it as either a phantom TN, or ACDN.
the format for the CFW key is: key 19 cfw x y, where x is the number of digits allowed to be entered and y is the dialable dn of the target. This allows you to restrict the number of digits a user can enter to prevent them from forwarding their phone offsite for example.
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