Calling Line Identifier
MX602 - PRELIMINARY INFORMATION
20
Mute decision point T1
Start Timer
T3, minimum valid DET pulse width
< 5ms between the falling edge of the DET
and FSK Mode selection.
DET pulse width (TDET
)
TDET
50ms
must be > T3 or < 65ms
to be considered a
valid DET
DET monitored for 50ms
after mode change
DET
Not a valid CIDCW transaction
sequence at this point
T2, time for muting
to take affect
MUTE
Should a DET pulse occur during
the 50ms DET monitoring, the pulse
will last a minimum of 8ms
TONE / FSK
MODE
No Signal
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 22, Invalid CIDCW Transaction Initiation Adjunct Box Timing Sequence (DET output goes high during
50ms quiet period)
Mute decision point T1 = 0 (no hold-off)
T3, minimum valid DET pulse width
Start Timer
< 5ms between the falling edge of the DET
and FSK Mode selection.
DET pulse width (TDET
)
TDET
must be > T3 or < 65ms
to be considered a
valid DET
50ms
DET monitored for 50ms
after mode change
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 23: Valid CIDCW Transaction Initiation Telephone Set Timing Sequence
© 1998 MX•COM Inc.
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