Calling Line Identifier/Calling Line Identifier on Call Waiting 14
CMX602A PRELIMINARY INFORMATION
START: (BT)
CMX602A in ZP mode
START: (Bellcore)
CMX602A in ZP mode
Line Reversal
No
Detected ?
Yes
Set CMX602A to
Tone Alert Detect mode.
Start 5 second timeout.
CMX602A DET
No
output high ?
Yes
CMX602A DET
No
output low?
Yes
Set CMX602A to
FSK Receive mode.
Restart 5 second timeout.
Wait 15ms
Apply
Current Wetting Pulse,
AC and DC terminations.
Read FSK Message,
display data if
checksum OK.
Clear timeout.
Remove any AC and DC
line terminations.
Set CMX602A to
Zero Power mode.
END
Ring signal
No
detected ?
Yes
End of
No
ring signal ?
Yes
Set CMX602A to
FSK Receive mode.
Start 5 second timeout.
Timeout
expired
Figure 13: Flow Chart for 'On-Hook' Operation of CMX602A
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