Semtech has announced its new ToPSync (Timing over Packet Synchronisation) ACS9510, combining IEEE1588v2 precision time protocol (PTP) with Semtech’s SONET/SDH synchronous equipment timing source (SETS) solution. The device is the first product in a new platform of timing solutions that meets the increasing needs of carriers worldwide in 3G, 4G, LTE (long term evolution) and WiMAX applications.
The ACS9510 enables IP networks to provide time alignment between base station nodes or network switches. As a consequence, it is not necessary to use costly GPS modules and oscillators at each node. The solution also facilitates the move from traditional leased lines to the use of public IP networks to provide the backhaul for broadband wireless base stations. ToPSync enables customers deploying next-generation wireless technologies to achieve precise time alignment down to 1 μs accuracy.
After extensive trials, several carriers have standardised on the solution for their IP backhaul networks. These carriers tested Semtech’s technology under heavily congested network conditions using a suite of tests and found that the device delivered better than 1 μs time alignment. The ACS9510 has undergone three years of continuous performance testing by a number of carriers.
The ACS9510 can operate in a traditional role in the SONET/SDH network providing a high-precision synchronisation solution within network elements, or it can use the ToPSync platform technology to provide reference clock signal transport across a carrier IP network. In its PTP role it can operate as a grandmaster or a slave, allowing for full hybrid deployment between packet- and circuit-based networks.
The ToPSync solution automatically adapts to packet delay variation, packet jitter and network reconfigurations to maintain the required frequency accuracy, phase stability or full time alignment. The IC also incorporates a precision holdover feature to maintain clock accuracy in the event of a network failure.
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