Hardware Description and Reference for Avaya ... - Avaya Support

Circuit packs, channel service units, and power supplies
TN735 MET line (4 ports)
Note:
Note: This circuit pack is no longer sold.
The TN735 MET line circuit pack has four ports that connect to multibutton electronic telephone
(MET) sets. Each port has tip and ring signals (analog voice) and digital signals to control
terminals such as BT, BR, LT and LR.
TN744E call classifier and tone detector (8 ports)
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- 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- and µ-Law companding.
In normal operation, a port on the TN744 circuit pack can serve as an incoming register for
Russia multifrequency shuttle register signaling (MFR). Use the TN744 with the TN429C analog
line CO trunk for CAMA/E911.
228 Hardware Description and Reference for Avaya Communication Manager