User Manual (DS6421-3 User Manual)
Page 58
... Caller ID log Intercom BACK SELECT • If you on another handset to highlight a destination handset and then press SELECT. Multiple handset use . 2. You can buy additional expansion handsets (DS6401) for conversations between two system handsets. The destination handset rings and displays HANDSET X is calling, or HANDSET X is calling.
... Caller ID log Intercom BACK SELECT • If you on another handset to highlight a destination handset and then press SELECT. Multiple handset use . 2. You can buy additional expansion handsets (DS6401) for conversations between two system handsets. The destination handset rings and displays HANDSET X is calling, or HANDSET X is calling.