Silicon and software for IEEE 1588 meets network synchronisation standards

November 02, 2015 // By Graham Prophet
Clock hardware and IEEE 1588 protocol stack software make packet-based synchronisation simpler to deploy, with IDT’s 82P339xx-1 that comprises IEEE 1588-compliant software and synchronisation management unit (SMU) ICs that deliver a complete telecom network synchronisation solution for IEEE 1588 and synchronous Ethernet.

Network synchronisation based on IEEE 1588 Telecom Boundary Clocks (T-BC) is a practical and cost-effective alternative to deploying Global Navigation Satellite System (GNSS) antennas at every node in the network. IEEE 1588 Telecom Boundary Clocks compliant with ITU-T G.8273.2 enable the recovery of accurate frequency and phase/time information over a packet-based network.

The IDT T-BC hardware is claimed to be deterministic, simpler and more automated than alternative silicon solutions as it requires less external processor intervention. The hardware/software solution includes an IEEE 1588 protocol stack, clock recovery servos for frequency and phase/time, and clock synthesis hardware with physical layer frequency support.

“Packet-based synchronisation has historically been challenging for system designers to implement because it requires a broad range of specialised technology and needs to meet stringent network standards,” said Louise Gaulin, vice president and general manager of IDT’s Network Communications Division. “The 82P339xx-1 products were engineered to be easy to use, flexible and to comply with the latest generation of packet-based synchronisation standards.”

The 82P339xx-1 SMUs automatically filter IEEE 1588 phase/time information and combine it with physical layer frequency information in accordance with ITU-T G.8273.2 to generate accurate, stable and low-jitter clocks. The phase/time and frequency filters are implemented in hardware to ensure deterministic filter bandwidths, eliminating the need for additional software processing.

The 82P339xx-1 product family is designed for applications including base stations, access equipment, routers, switches, optical equipment and servers. Standards compliance has been validated and test reports are available with the results.

IDT; www.idt.com