CC-2401K2A-CS Copeland Communications Inc, CC-2401K2A-CS Datasheet - Page 22

• Manufacturer Part Number: CC-2401K2A-CS
• Description: MODEM 2400BAUD SECURE 3.3V
• Manufacturer: Copeland Communications Inc

Specifications of CC-2401K2A-CS

• Data Format: V.21, V.22, V.23, Bell 103
• Baud Rates: 2.4k
• Interface: UART
• Voltage - Supply: 3 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: Module
• For Use With: 539-1002 - KIT EVALUATION WORLD MODEM II
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 539-1010; CC-2401K2A-CS

© 2007, Copeland Communications, Inc.
Manual Call Progress Detection
Because other call progress tones beyond those described above may exist, the CC-2401 supports manual
call progress. This requires the host to read and write the low-level DSP registers and may require realtime
control by the host. Manual call progress may be required for detection of application specific ringback, dial
tone and busy signals. The section on DSP level control should be read before attempting manual call
progress detection.
The call progress biquad filters can be programmed to have a custom frequency response and detection level.
Four dedicated user defined frequency detectors can be programmed to search for individual tones. The four
detectors have center frequencies that can be set by registers UDFD1-4. SE5[6][TDET] [SE8 = 0x02] Read
Only Definition can be monitored, along with TONE, to detect energy at these user defined frequencies. The
default trip-threshold for UDFD1-4 is -43 dBm but can be modified with register UDFSL.
By issuing the “ATDT;” command, the modem goes off hook and returns to command mode. The user can
then put the DSP into call progress monitoring by first setting SE8 = 0x02. Next, set Se5(DSP2) = 0x00 so no
tones are transmitted, and set SE6 (DSP3) to the appropriate code, depending on which types of tones are to
be detected.
Register
S1B
S16
S17
S18
S19
S1A
Name
BTON
BTOD
RTON
RTOD
BTOF
RTOF
Ringback tone Delta time
Page 22 of 66
Data Sheet
Ringback tone on time
Ringback tone off time
Busy tone delta time
Busy tone on time
Busy tone off time
Function
53.333 ms
53.333 ms
53.333 ms
CC-2401K2 Datasheet Rev 1.5
10 ms
10 ms
10 ms
Units
CC-2401K2