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

TN725B speech synthesizer
TN725B speech synthesizer
The TN725B speech synthesizer supports English and is used in the US.
The TN725B speech synthesizer circuit pack has four ports that send voice message
information to telephones. These messages activate leave word calling, automatic wake up,
voice message retrieval, and Do Not Disturb features. The ports can detect tones.
TN726B Data Line (8 ports)
Note:
Note: This circuit pack is no longer sold.
The TN726B data line circuit pack has eight serial asynchronous EIA port. These ports have
modem interfaces that are connected through asynchronous data units (ADUs) to EIA ports,
such as RS-232, on DTE. The TN726B circuit pack uses Mode 2 or Mode 3 data transfer
protocol. The DTE can be adjuncts and peripheral equipment such as:
● data terminals,
● printers,
● host computers,
● personal computers (PCs),
● graphics and fax systems,
● and call detail acquisition and processing systems (CDAPSs).
With software-administered system access ports, a TN726B circuit pack connects through a
cross-connect field to a TN553 packet data line circuit pack. The TN553 circuit pack then
converts mode 2 protocol to mode 3 protocol. Mode 3 protocol transfers the TN726B circuit
pack from the packet bus to the TDM bus for EIA connections.
Each port on a TN726B circuit pack has:
● TXT (terminal, transmit, and tip),
● TXR (terminal, transmit, and ring),
● PXT (port, transmit, and tip), and
● PXR (port, transmit, and ring) signal leads.
Issue 6 February 2007 227