A pluggable synchronization module comprising: an antenna input ; a Global Navigation Satellite System receiver operative to receive satellite-transmitted signals comprising positioning-related information over said antenna input , wherein said Global Navigation Satellite System receiver is further operative to determine a time reference from received said positioning-related information and to provide a time reference signal according to said determined time reference; an electrical interface supporting communication with said pluggable synchronization module ; and a processing circuitry connected to said Global Navigation Satellite System receiver and to said electrical interface , wherein said processing circuitry is operative to deduce synchronization information from said time reference signal and to transmit said deduced synchronization information over said electrical interface , wherein said processing circuitry is further operative to: - receive an external time reference information from a host unit over said electrical interface ; and - deduce synchronization deviation information by comparing said external time reference information received over said electrical interface with said time reference signal provided by said Global Navigation Satellite System receiver ; whereby said deduced synchronization information to be transmitted comprises said synchronization deviation information, and wherein said pluggable synchronization module is configured to be placed within a small form-factor pluggable (SFP) cage of a network element and wherein said electrical interface being a small form-factor pluggable interface operative to connect said processing circuitry to the network element. an antenna input ; a Global Navigation Satellite System receiver operative to receive satellite-transmitted signals comprising positioning-related information over said antenna input , wherein said Global Navigation Satellite System receiver is further operative to determine a time reference from received said positioning-related information and to provide a time reference signal according to said determined time reference; an electrical interface supporting communication with said pluggable synchronization module ; and a processing circuitry connected to said Global Navigation Satellite System receiver and to said electrical interface , wherein said processing circuitry is operative to deduce synchronization information from said time reference signal and to transmit said deduced synchronization information over said electrical interface , wherein said processing circuitry is further operative to: - receive an external time reference information from a host unit over said electrical interface ; and - deduce synchronization deviation information by comparing said external time reference information received over said electrical interface with said time reference signal provided by said Global Navigation Satellite System receiver ; whereby said deduced synchronization information to be transmitted comprises said synchronization deviation information, and - receive an external time reference information from a host unit over said electrical interface ; and - deduce synchronization deviation information by comparing said external time reference information received over said electrical interface with said time reference signal provided by said Global Navigation Satellite System receiver ; wherein said pluggable synchronization module is configured to be placed within a small form-factor pluggable (SFP) cage of a network element and wherein said electrical interface being a small form-factor pluggable interface operative to connect said processing circuitry to the network element. <EOS>