Avaya Definity TN726B Data Line (8-Ports).
More Information
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Provides 8 serial asynchronous EIA ports with modem interfaces connected through asynchronous data units (ADUs) to EAI ports on DTE
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Uses Mode 2 or Mode 3 data transfer protocol
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DTE can be adjuncts and peripheral equipment such as data terminals, printers, host computers, PCs, etc
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With software-administered system access ports, a TN726B connects through a cross-connect field to a TN553 packet data line circuit pack
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Each port has TXT, TXR, PXT, and PXR signal leads
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