Call classifier card functionality

[talwa]

Hi All,

Can someone explain to me what is the use of having a call classifer card in my CM system?

is it always mandatory or can i do without it also?

[sinhar]

The TN744 call classifier and tone detector circuit pack has eight ports of tone detection on the
TDM bus. The TN744 circuit pack does not support call progress tone generation or clocking.
The tone detectors are used in vector prompting, outgoing call management (OCM), and call
prompting applications in the United States and Canada. The tone detectors are also used for
call classifier options for various countries. The TN744 circuit pack detects special intercept
tones that are used in network intercept tone detection in OCM. The TN744 circuit pack also
detects tones when a central office (CO) answers a call.
The TN744 circuit pack provides tone generation and detection for R2-MFC direct inward
dialing (DID) signaling. DID signaling is used in installations outside the United States. The
TN744 circuit pack supports A-Law and Mu-Law companding. TN744 also allows gain or loss to

be applied to pulse code modulation (PCM) signals that are received from the bus. The TN744

circuit pack detects 2025-, 2100-, or 2225-Hz modem answerback tones and provides normal
broadband and wide broadband dial-tone detection.
The TN744 circuit pack supports digital signal processing of PCM signals on each port to
detect, recognize, and classify tones and other signals. Generation of signaling tones is also
supported for applications such as R2-multifrequency code (R2-MFC), Spain MF, and Russia
MF. Gain or loss and conferencing can be applied to PCM signals that are received from the
TDM bus. Additional support includes DTMF detectors to collect address digits during dialing

and A-Law and μ-Law companding.

[talwa]

Thanks a lot