Clock for a node of a packet-switched network, and associated synchronisation method

A clock for a node of a packet-switching network comprising:

• a synchronisation management module configured to receive on the packet-switching network sets of parameters respectively relating to external clocks arranged in other nodes of said network, to compare said sets of parameters in order to select a master clock from among said external clocks, and to exchange time-stamped messages on the packet-switching network with said master clock in order to make said clock subservient to said master clock,
• wherein the set of parameters relating to at least one so-called external clock comprises a parameter relating to a frequency source controlled by a synchronous physical layer technology and colocated with said external clock, said synchronisation management module being able to select said master clock based on said parameter or each parameter relating to a frequency source controlled by a synchronous physical layer technology.

A clock for a packet-switching network node comprising:

• a synchronisation management module configured to send on the packet-switching network a set of parameters relating to said clock intended for an external clock arranged in another node of said network, and to exchange time-stamped messages on the packet-switching network with said external clock in order to make a slave clock selected from among said clock and said external clock subservient to a master clock selected from among said clock and said external clock,
• wherein said set of parameters comprises a parameter relating to a frequency source controlled by a synchronous physical layer technology and arranged in said node.