AT&T DL72119 - Troubleshooting

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Appendix
Add and register handsets/headsets/speakerphones
If registration fails, the system will automatically try to register again. If
registrationfailsaerthethirdtry,Registration failed appears on the handset
screen. The handset shows To register, see user manual and the telephone
basereturnstoidlemode.Thismaytakeuptoveminutestooccur.Please
start again from Step 1.
Notes:
f You cannot register a handset if any other system handset is in use.
f If you try to register more than ve handsets to the telephone base, the telephone base shows Registration slots
are full and sounds two beeps..