Appendix C
Adding and registering handsets
Your telephone can accommodate up to twelve cordless handsets. You can add new handsets (SL80108, sold separately) to the SL81108/SL81208 at any time, but each new handset must be registered with the telephone base before use.
Each handset must be registered separately.
The handset provided with your SL81108 is automatically registered as handset 1. Additional handsets will be assigned numbers in the order they are registered (handset 2, handset 3, handset 4 and so on). You can register eleven additional handsets.
The SL81208 has two handsets automatically registered as handset 1 and handset
2.You can register ten additional handsets, which will be assigned as handset 3, handset 4 and so on.
Handsets purchased separately need to be registered to NOT REGISTERED the telephone base before use. When first purchased, all
optional accessory handsets will show NOT REGISTERED on the screen. The new handset(s) may need to be charged for five minutes before registering to the telephone base.
PRESS HNDST LOC 4 SEC ON BASE
PLEASE WAIT...
HS X REGISTERED
To register a handset to your telephone base
1.Place the unregistered handset into the telephone base. If PRESS HNDST LOC 4 SEC ON BASE does not appear on the handset screen after a few seconds, remove the handset and place it in the telephone base again.
2.On the telephone base, press and hold 
HANDSET LOCATOR for about four seconds (until the red IN USE light on the telephone base turns on) and then release the button. The handset will show PLEASE WAIT... and it will take about 10 seconds to complete the registration. The handset will show HS X REGISTERED and will beep if the registration is successful.
NOTES:
1.If the registration is not successful, the display will show NOT REGISTERED. To reset the handset, remove the handset from the telephone base and place it back in. Try the registration process again.
2.You cannot register a handset if any other system handset is in use.
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