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4.9 KX-TA, KX-TD, and KX-TE Series PBX Feature Programming for APT/DPT Integration
Installation Manual 147
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.