Uniden DXAI5688 - Manual (Page 48)

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Changing.the.Digital.Security.Code
To protect you against misbilled calls which might result from your phone being activated by other equipment, the
cordless phone provides Random Code™ digital security which automatically selects one of over 262,000 digital
security codes for each handset and the base. If the handset battery pack is completely discharged or the battery
pack is removed, the digital security code will be lost. If this happens, a new security code is set automatically the
next time the battery pack is charged in the base. In the rare situation that you suspect another cordless telephone is
using the same security code, you can change the code.
) Pick up the handset from the cradle. Press and hold [find hs] on the base.
2) While holding [find hs], place the handset in the base, and leave the handset in the base for more than five
seconds.
3) Pick up the handset from the base. Then place the second handset in the base and wait for more than
five seconds. No need to hold [find hs] this time.
4) Repeat step 3 for the rest of handsets.
5) Press [talk/flash] on one handset. Once you make sure TALK appears on the display, press [end]. Then, try with
all other handsets. If each handset displays TALK, a new security code is set. Otherwise, return to step  and try
again.