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[SP-PHONE] on the base unit. 
– When only 1 cellular phone is registered or the 
line is set to make cellular calls (page 70), 
press [CELL] on the handset, then press [SP-
PHONE] on the base unit. 
If the handset is on the base unit, simply lift it. 
Adjusting the speaker volume 
Press [+] or [-] repeatedly while talking. 
Redialing the last number dialed 
1.  Press [CELL 1] or [CELL 2]. 
2.  [REDIAL] 
Making landline calls 
1.  [SP-PHONE]  
2.  Dial the phone number. 
3.  When the other party answers, speak into the 
microphone. 
4.  When you finish talking, press [SP-PHONE].