A method for synchronizing distributed clocks by the Precision Time Protocol, in a telecommunication network, comprising the steps of: - sending a Sync message (SYNC) from one clock to another via a plurality of network nodes (IPRB, IPRI1, IPRI2, IPRC), a first of these nodes comprising a first peer-to-peer transparent clock (P2P TC B) and a second of these nodes comprising a second peer-to-peer transparent clock (P2P TC C), - estimating the path delay of the transmission path travelled by the synchronization message from the first to the second peer-to-peer transparent clocks, by: -- sending a Pdelay_Req message from the second peer-to-peer transparent clock (P2P TC C) to the first peer-to-peer transparent clock (P2P TC B), -- and sending a Pdelay_Resp message from the first peer-to-peer transparent clock (P2P TC B) to the second peer-to-peer transparent clock (P2P TC C), - and then taking this path delay into account for updating the time information carried by a synchronization message, in the second peer-to-peer transparent clock (P2P TC C); characterized in that, for estimating said path delay it comprises the steps of: - using a tool, available at the transport protocol level, for creating in network node associated to the first peer-to-peer transparent clock (P2P TC B), a list of the network addresses of the network interfaces (IPRB, IPRI1, IPRI2, IPRC) traversed by the synchronization message (SYNC) along its transmission path between the first and the second peer-to-peer transparent clocks (P2P TC B, P2P TC C); - ordering the first list into the order in which the network interfaces have been traversed by the Sync message (SYNC); - creating a second list by reversing the order of the first list; - communicating the second list to the second peer-to-peer transparent clock (P2P TC C); - and using the mechanism available at the transport protocol level, in network nodes associated respectively to the first and the second peer-to-peer transparent clocks (P2P TC B, P2P T CC), to constrain the respective paths of Pdelay_Req and Pdelay_Resp messages so that their respective paths map to the second and first ordered lists of traversed interfaces. - sending a Sync message (SYNC) from one clock to another via a plurality of network nodes (IPRB, IPRI1, IPRI2, IPRC), a first of these nodes comprising a first peer-to-peer transparent clock (P2P TC B) and a second of these nodes comprising a second peer-to-peer transparent clock (P2P TC C), - estimating the path delay of the transmission path travelled by the synchronization message from the first to the second peer-to-peer transparent clocks, by: -- sending a Pdelay_Req message from the second peer-to-peer transparent clock (P2P TC C) to the first peer-to-peer transparent clock (P2P TC B), -- and sending a Pdelay_Resp message from the first peer-to-peer transparent clock (P2P TC B) to the second peer-to-peer transparent clock (P2P TC C), -- sending a Pdelay_Req message from the second peer-to-peer transparent clock (P2P TC C) to the first peer-to-peer transparent clock (P2P TC B), -- and sending a Pdelay_Resp message from the first peer-to-peer transparent clock (P2P TC B) to the second peer-to-peer transparent clock (P2P TC C), - and then taking this path delay into account for updating the time information carried by a synchronization message, in the second peer-to-peer transparent clock (P2P TC C); - using a tool, available at the transport protocol level, for creating in network node associated to the first peer-to-peer transparent clock (P2P TC B), a list of the network addresses of the network interfaces (IPRB, IPRI1, IPRI2, IPRC) traversed by the synchronization message (SYNC) along its transmission path between the first and the second peer-to-peer transparent clocks (P2P TC B, P2P TC C); - ordering the first list into the order in which the network interfaces have been traversed by the Sync message (SYNC); - creating a second list by reversing the order of the first list; - communicating the second list to the second peer-to-peer transparent clock (P2P TC C); - and using the mechanism available at the transport protocol level, in network nodes associated respectively to the first and the second peer-to-peer transparent clocks (P2P TC B, P2P T CC), to constrain the respective paths of Pdelay_Req and Pdelay_Resp messages so that their respective paths map to the second and first ordered lists of traversed interfaces.