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DEFINITY Made Easy Tools
Issue 2, November 2000
DEFINITY Hardware
TN744B/C/D
TN744B has 8 tone detectors used in vector prompting, outgoing call management (OCM), and call prompting applications in the United States and Canada. The TN744 detects special intercept tones used in network intercept tone detection in OCM. The TN744 also detects tones when a CO answers a call. The TN744 does not classify data calls. Instead, a tone detector circuit pack classifies the calls. If the TN744 does not classify the call within 60 seconds, it is removed from the call and timed far-end supervision classifies the call.
The TN744 provides tone generation and detection for R2-MFC DID signaling used in non-United States installations. The TN744 also allows gain or loss to be applied to pulse code modulation (PCM) signals received from the bus and supports A-Law and µ-Law companding. The TN744 detects 2025 Hz, 2100 Hz, or 2225 Hz modem answerback tones and provides normal broadband and wide broadband dial tone detection. For MFC, the TN744 vintage 7 or greater call classifier is required.
TN744B/C circuit pack has 8 ports of tone detection on the TDM bus. The TN744/B/C does not support call progress tone generation or clocking
The TN744/B/C processor supports digital signal processing of PCM signals on each port to detect tones and other signals. Generation of signaling tones is also supported for applications such as R2-MFC, Spain MF, and Russia MF. Gain (or loss) and conferencing can be applied to PCM signals received from the TDM bus. Additional support includes DTMF detectors to collect address digits during dialing, and A-Law and µ-Law companding.
TN744D circuit pack has 8 ports of tone detection on the TDM bus. The TN744D does not support call progress tone generation or clocking.
The TN744D supports all of the functions of the TN744C plus additional call classifier options for various countries. The TN744D processor 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-MFC, Spain MF, and Russia MF. Gain (or loss) and conferencing can be applied to PCM signals received from the TDM bus. Additional support includes DTMF detectors to collect address digits during dialing, and A-Law and µ-Law companding.
In normal operation, a port on the TN744D may serve as an incoming register for Russia MFR (multi-frequency shuttle register signaling). Use the TN744D Vintage1 with the TN429C analog line central office trunk for CAMA/E911.
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| Copyright� 2000 Avaya Inc |
| Send comments to MadeEasy Development Team |
| Always check at the Made Easy Web site for the most current information. |