EM91403 SERIES
TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE
AND DUAL-TONE MELODY GENERATOR
RING
DRING
HKS
RMUTE
Toff
Ton
Figure 11. Timing of receiving an incoming call
* The external ring detection circuit must send a low signal at the total ring cycle (Ton and Toff)
RING
DRING
HKS
RMUTE
Figure 12. Timing of making an outgoing call
* This specification are subject to be changed without notice.
10.1.1997 18