Question about Uniden DCT-748-4 Telephone
I have another Dct 748 unit which has a defective base unit. Can I use the handsets to expand beyond 4 handsets?
No. This model of phone can only support 4 handsets. If you need more than that, you will need to have a second base unit.
One of my handsets went bad, and I just bought complete DCT748-4 package from a seller on eBay for a very good price. This set was used, but in very good condition. I didn't need the whole set - just one handset - but like I said, it was a good price. Anyway, I began by telling my old base unit to de-register handset #2 (the failed unit). However, I then found that I could not register the "new" handset with my old base unit because it was already registered to the "new" base unit. So, I first had to apply power to the "new" base unit and de-register the handsets. Then, I placed one of the "new" handsets onto my old base unit, and it said "Handset Registering ..." and registered just fine. Just for the fun of it, I placed one of the other spare handsets into my old base unit. It said "Hanset Registering ..." but then it beeped and said "Registration Failed." This is because I already had 4 handsets registered to my base, and the base can not handle a fifth handset.
Posted on Mar 22, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
 Verify that the AC power cord is connected to the DCT*
and an AC outlet.
 If the DCT* is connected to a switched outlet on another
unit, verify that that unit is powered on.
 Press the POWER button on the DCT* front panel instead
of the remote control. The batteries in the remote control
may be depleted
 The DCT* may have received a software update and
may not power on while the new software is being
installed. Try again in a few minutes.
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