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Telecom solutions symmetricom dcd-lpr primary reference
Telecom Solutions / Symmetricom DCD-LPR
Primary Reference Source w/ Modules
The Symmetricom DCD-LPR/C is a front-end primary reference source used with the DCD timing platform for synchronizing digital telecommunications networks, and is fully compliant with CE mark requirements.
The DCD-LPR/C can provide the Primary Reference Source (PRS) required at any key network node, independent of land-line timing distribution. Using readily available radio disseminated services, such as GPS (Global Positioning System), the DCD-LPR/C generates E1 clocking signals which exceed ITU, ANSI and Bellcore requirements for PRS accuracy and stability.
This creates a more survivable network architecture, in which network maintenance and administration are reduced, while performance, reliability, and services are enhanced.
The DCD-LPR/C employs an integrated, roof-mounted GPS antenna and Timing Receiver (GTR). The GTR uses an all-in-view method to ensemble up to six GPS satellite signals with a dynamic averaging technique that mitigrates the effects of Selective Availability (SA). The UTC timing from the GTR is then passed to the GPS Timing Interface (GTI) card in the DCD-LPR/C shelf.
The LCD messages on the front panel of the GTI indicate the current performance of the card or any required diagnostic information.
The E1 signal becomes the PRS signal to the SSU (Synchronisation Supply Unit) or BITS (Building Integrated Timing Supply) for office clock distribution.
Existing DCD sites can be cost-effectively upgraded to PRC performance with the DCD-LPR/C. This upgrade is built on the use of existing DCD plug-in sets.
Used with the Multi-Reference Controller (MRC) card in a DCD-500 system, the GTI outputs are used in a sophisticated majority scheme that qualifies each input against the other for further enhanced PRC capability and primary reference management functionality.
* Compliant to ANSI, Telcordia, ETSI, ITU-T, NEBS, and CE/AS standards
