- Written by Radu Handolescu
- Posted on March 3, 2023
- Updated on March 31, 2023
- 1338 Views
Common Management Interface Specification (CMIS) defines, starting with revision 4.0, a standard mechanism for managing the firmware of compliant transceivers. This mechanism allows for transceivers’ firmware to be updated without having to remove the transceiver from the switch. Firmware updates may be necessary in a testing or production environment to resolve potential firmware bugs. Some transceivers may also support firmware management operations in a hitless manner (without impacting traffic).
- Written by Alex Volinsky
- Posted on September 11, 2023
- Updated on September 11, 2023
- 211 Views
Coherent transceivers, compliant with Coherent Common Management Interface Specification (C-CMIS) maintain two sets of thresholds to detect and report two types of link degradation: FEC excessive degrade (FED) and FEC detected degrade (FDD).
- Written by Radu Handolescu
- Posted on September 17, 2021
- Updated on September 17, 2021
- 3158 Views
Common Management Interface Specification (CMIS) compliant transceivers are configured by selecting an
- Written by Brian Schuette
- Posted on June 5, 2023
- Updated on June 9, 2023
- 602 Views
In an optical transceiver, electrical signals leaving the switch are converted to optical signals in the transmit path. Optical signals arriving at the transceiver are converted to electrical signals that enter the switch in the receive path. At the point of conversion, an automatic decision can be made to turn off (squelch) output when the input level drops below a certain threshold of usability (usually, LOS condition.) This is referred to as automatic squelching.