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 Packet PRS (IEEE 1588 PTP). Advances in IEEE 1588 Precision Time Protocol, 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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Symmetricom's TimeProvider 100 is a cost-effective solution for synchronization and retiming telecommunications networks. This GPS controlled frequency source system receives GPS satellite signals to control an onboard oscillator and provide t hree output signals.
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TimeProvider® 1500 is a carrier-class Packet PRS system that enables easy migration to packet-based networks. Powered by a Symmetricom Rubidium Miniature Atomic clock, TimeProvider 1500 has the ability to synchronize to another non co-located grandmaster clock over packet-based networks.
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Based on the latest Cesium III technology our TimeCesium™ 4400 is an autonomous Primary Reference Source designed to generate superior, highly reliable Stratum 1 synchronization signals for advanced telecom network services.
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Cesium III beam tube technology equips core telecom network offices with Stratum 1 synchronization signals for total control of advanced network synchronization services.
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The TimeProvider® 5000 PTP Grandmaster receives a GPS input as a primary reference for high precision packet network synchronization.
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Primary Reference Sources Overview
Primary Reference Sources Selection Guide
Application Notes
Reducing Churn in GSM Networks (PDF)
White Papers
Mitigating GPS Vulnerabilities (PDF)
Synchronization Implications of FTTH and FTTC Architectures (PDF)
