Half Duplex


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Half Duplex

In telecommunications, a system that allows transmission between two endpoints, but not simultaneously. For example, if two people have walkie talkies, each may speak to the other, but the signal will not transmit if both try to speak at the same time. This contrasts with a full duplex, in which information may be transmitted both ways at the same time.
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The Packet Armor family includes a single chip, high-performance streaming encryption device for OC-48c full duplex and OC-192 half duplex security applications providing full support for the IPSec standard.
Adaptec's AFC-9110G is a 1 Gbit HBA with data transfer speeds of 100 MB/sec in half duplex mode and 200 MB/sec in full duplex mode.
With the HFA3783, the receive and transmit IF paths share a common differential matching network so that only a single IF filter is required for half duplex transceivers.
Other features include: Hardware-based 10/100, full or half duplex, flow control and automatic negotiation; individual port-forced modes (full duplex, 100BaseTX) when auto negotiation is disabled; full-duplex IEEE 802.