Telecom Primary Reference Sources
The highest level of time and frequency accuracy throughout the network
All clocks in a synchronization network must be referenced, or traceable, to a Primary Reference Source. Symmetricom’s GPS Primary Reference Sources (PRSs), also known as "master clocks," provide the highest level of time and/or frequency accuracy for telecom networking as required by international standards. Our wide variety of PRSs are categorized by the source that is used to derive their timing outputs: GPS (Global Positioning System), Cesium (atomic clock), or CDMA (Code Division Multiple Access). Advances in GPS and atomic clock technologies have made providing precision time and frequency within the network more widely available, which assures the highest level of time and frequency accuracy throughout the network.
Designed for public network service providers, TimeSource 3000 provides your network Stratum 1 performance when locked to GPS or up to 72 hours if GPS signals are interrupted.
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TimeSource 3100 provides your network Stratum 1 performance when locked to GPS or up to 72 hours if GPS signals are interrupted. Its integrated GPS receiver meets ITU-T G.811 network performance requirements.
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TimeSource 3500 is a stand alone Primary Reference Source (PRS) that meets GR 2830 network PRS performance requirements by using a GPS antenna mounted inside a window or on an outside wall. It provides Stratum 1 performance in GPS hostile environments, such as through windows, walls or roofs.
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Like the TimeSource 3500, the TimeSource® 3600 is a standalone Primary Reference Source (PRS) which provides Stratum 1 performance in GPS hostile environments, such as through windows, walls or roofs. It meets ITU-T G-811 network PRS performance requirements inside a building using an antenna mounted inside a window or on an outside wall.
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TimeProvider 1000 meets the need for high quality synchronization beyond the network core and into metro and access offices. Its innovative architecture combines the tasks of tracking incoming timing references, qualifying the signals, filtering and distributing precise synchronization onto a single universal Input, Output and Clock card (IOC).
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Carrier grade TimeProvider 5000 combines hardware-based time stamping with the highest level of packet-based timing and frequency accuracy to enable providers to roll out feature-rich, lower-cost, packet-based services without having to sacrifice timing accuracy or all important quality of service.
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Symmetricom’s TimeGPS is the low cost solution for synchronization and retiming telecommunications networks. This GPS controlled frequency source system receives GPS satellite signals to control an onboard oscillator and provide three output signals.
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Primary Reference Sources Overview
Primary Reference Sources Selection Guide
Application Notes
Reducing Churn in GSM Networks (PDF)
White Papers
Synchronization Implications of FTTH and FTTC Architectures (PDF)
