4.9 KX-TA, KX-TD, and KX-TE Series PBX Feature Programming for APT/DPT Integration
6.
Click "OK". "Flexible CO Key" screen (for all CO Keys) displays again.
7.
Click "OK". "4-2 Extension Line" screen displays again.
8.
Click "OK" or "Apply".
9.
Repeat these steps for each extension.
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