* This specification are subject to be changed without notice.

AG8889

CALL WAITING DECODER

4

8.8.2000

WAVE FORM TIMING

DO timing:

OSC timing:

line event

Tvd

CAS

Tinvd

normal on hook

Tfvd

Tfinvd

Tdvd

Tdinvd

Tvd=Tfvd+Tdvd

Tinvd=Tfinvd+Tdinvd

alert

tone

(~80ms)

off hook

engaged call

Sym.

Description

Min.

Typ.

Max.

Unit

Tfvd

filter output signal valid delay

6

ms

Tfinvd

filter output signal invalid delay

6

ms

Tdvd

digital delay of valid signal

36

ms

Tdinvd

digital delay of invalid signal

20

ms

Tvd

total delay of valid signal

42

ms

Tinvd

total delay of invalid signal

26

ms

alert

input alert tone length

80

ms

tone

(2130 ,2750 Hz @ -20dBm )

Tosc

Oscillator enable delay time

10

ms

OSCI

OSC on

OSC off

Tosc

(OSCO)

Power

power off

power on

on/off

PWD

Tosc

OSC off

Note: detected alert tone length shown above is assumed that no speech signals input.

test under alert tone signal = -22dBm (600

Ω)