EM91420 SERIES

TONE/PULSE SWITCHABLE DIALER WITH LCD INTERFACE

AND DUAL-TONE MELODY GENERATOR

5

* This specification are subject to be changed without notice.

10.1.1997

FUNCTION DESCRIPTIONS

Dialing signal selection

The EM91420 series incorporated a special keyboard scanning function that is connecting a resistor (typically

is 560 Kohms) on keyboard scan pin to select many telephone specifications. The specifications are described

as following :

a. Mode

b. M/B ratio

ROW1

Mode

ROW2

MBR (%)

R-Vdd

20 PPS

NR

40:60

NR

Tone

R-Vss

33:66

R-Vss

10 PPS

c. Flash time

d. Lock control method

ROW3

ROW4

Tf (ms)

COL1

Control method

NR

NR

600

R-Vdd

key lock

NR

R-Vss

100

NR

none lock

R-Vss

NR

80

R-Vss

password lock

R-Vss

R-Vss

300

e. Lock number

COL2

COL3

Lock number

NR

NR

none

NR

R-Vss

0

R-Vss

NR

9

R-Vss

R-Vss

0.9

Normal dialing

Directly keying digital key on keyboard which number can be dialing output and stored in LNB memory

automatically. Operating procedure described as follow :

• To select Pulse or Tone mode.

• Off-hook or turn on HF function.

• Keying d1, d2, .. , dn. The “d” expressed digital keypad that included 1~9, *, 0, #, P, and P

→T keys. The “n”

expressed unlimited.

• The numbers d1, d2, .. , dn will be dialed out in Pulse or Tone mode as selection.

LNB redial memory

Storing:

In normal dialing mode, every digital key was entry which number will be stored in LNB memory

automatically. If entry digits are more than 32 digits, the redial function of LNB memory will be disabled.

Otherwise, these numbers stored in LNB memory can be redial output.