* This specification are subject to be changed without notice.

4

4.28.1999

EM91850

TONE/PULSE DIALER WITH HF, HD, REDIAL

AND VOLUME CONTROL FUNCTION

Preliminary

FUNCTION DESCRIPTIONS

Dialer Option selection

The EM91850 incorporated a special keyboard scanning function that is connecting a resistor ( typically is

560 K

Ω ) on keyboard scan pin to select many telephone specifications.

The specifications are described as follow :

a. M/B ratio

K2

M/B ratio

NR

40:60

R-Vss

33:66

b. Auto Insert Pause time

d. Mode

K3

Auto Insert

K5

Mode

Pause time

NR

Disable

NR

Tone

R-Vss

Enable

R-Vss

Pulse

Normal Dialing :

Press the digital key directly on keyboard which number can be dialing out and stored in LNB memory auto

matically. Operating procedure described as following:

• To select Pulse or Tone mode.

• Off-Hook or turn on HF function.

• Keying d1,d2,....dn. The "d" expressed digital key pressed that include 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 Function :

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.

Redialing :

EM91850 provide Redial and One Key Redial function

(1) Redial function

Off-Hook normal dialing directly keying "F" key (or ON-OFF Hook once) and key-in "RD" keyboard.

The numbers stored in LNB memory will be dialed out.

(2) One Key Redial function

Off-Hook normal dialing, if busy, press the "RD" key directly then the line will be broken about 1.2 sec

with Trp redial pause time and dial out the numbers stored in LNB memory automatically.