Calling Line Identifier
MX602 - PRELIMINARY INFORMATION
18
Central
Office
nc
ring
tip
Audio
Circuits
DTMF
Encoder
mute
control
Hook
Switch
RD
RXD
RT
RXCLK
DET
Line
Protection
Network
Input
Interface
Components
(R, C, D)
Keypad
µC
AMPOUT
MX602
IN-
IRQ
ZP
IN+
Caller Identity Display
Figure 18: Telephone Set Interface
5.2.5 Timing Diagrams
Figure 19, Figure 20, Figure 21, Figure 22, Figure 23, Figure 24, Figure 25, and Figure 26 are timing diagrams which
illustrate the CIDCW transaction initiation sequence for various cases.
Mute decision point T1
T3, minimum valid DET pulse width
Start Timer
< 5ms between the falling edge of the DET
DET pulse width (TDET
)
and FSK Mode selection.
50ms
DET monitored for 50ms
after mode change
TDET
must be > T3 or < 65ms
to be considered a
valid DET
DET
T2, time for muting to take affect
MUTE
0.5ms to 10ms from end of CAS to DET falling edge
TONE / FSK
MODE
Initiate CIDCW
transaction
sequence
75ms < TCAS < 85ms
at this point
CAS
NEAR END
VOICE
FAR END
VOICE
Note: The actual signal received by the MX602 is the sum of the CAS, Near-End Voice, and Far-End Voice signals.
Figure 19, Valid CIDCW Transaction Initiation Adjunct Box Timing Sequence
© 1998 MX•COM Inc.
www.mxcom.com Tele: 800 638-5577 336 744-5050 Fax: 336 744-5054
Doc. # 20480136.004
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