In optical networking, DAC Cable refers to Direct Attach Copper Cable. A fixed copper cable assembly with transceiver-style connectors, available in passive and active versions for short high-speed links. Engineers commonly encounter it while planning or operating Rack-level server and switch connections.
For DAC Cable, interoperability and acceptance start with the governing specification. Connector and cabling choices should be checked against IEC, TIA, or ISO cabling practice and the transceiver vendor's optical-interface requirements. Project documentation should identify the edition, host assumptions, and any vendor-specific limits that apply.
DAC Cable should not be treated as another name for UPC vs APC. DAC Cable is defined here as a fixed copper cable assembly with transceiver-style connectors, available in passive and active versions for short high-speed links. By comparison, UPC vs APC means Two fiber end-face polish types. APC uses an angled end face to reduce back reflection, while UPC uses a flat ultra-polished surface. The two concepts may appear in the same design, but they answer different engineering or purchasing questions.
When selecting or documenting DAC Cable, verify fiber grade, connector geometry, polarity, insertion loss, return loss, cleanliness, and patch-panel count. A common mistake is to assume that support for AEC Cable automatically confirms support for DAC Cable; the exact data sheet, host configuration, and test conditions must show that relationship.
Frequently Asked Questions
Are DAC Cable and UPC vs APC interchangeable?
No. DAC Cable describes a fixed copper cable assembly with transceiver-style connectors, available in passive and active versions for short high-speed links, while UPC vs APC describes Two fiber end-face polish types. APC uses an angled end face to reduce back reflection, while UPC uses a flat ultra-polished surface. Confirm both separately when the design uses both concepts.
Where is DAC Cable normally used?
Typical use includes Rack-level server and switch connections. The exact implementation still depends on the host equipment, link design, environment, and governing specification.
What should a DAC Cable specification include?
It should state fiber grade, connector geometry, polarity, insertion loss, return loss, cleanliness, and patch-panel count. These details allow a supplier or engineer to verify the requirement instead of relying only on the term DAC Cable.
Need help selecting a compatible transceiver?
Tell us your target platform, data rate, fiber type, and transmission distance.