Method and system for synchronous high speed ethernet gfp mapping over an optical transport network

A system for distributing reference timing between at least two different communication networks, the system comprising:

• at least one first communication network, each first communication network operating according to a first communication protocol;
• at least one second communication network, each second communication network operating according to a second communication protocol;
• and
• an interworking device communicatively coupled to the first communication network and the second communication network, the interworking device:
• recovering a first reference timing signal from data received from the first communication network;
• transforming the first reference timing signal to a second reference timing signal wherein the second reference timing signal is phase and frequency locked to the first reference timing signal;
• and
• supplying the second reference timing signal to clock the second communication network.

A method for distributing timing between at least two different communication networks, the method comprising:

• recovering a first reference timing signal from data received from the first communication network;
• transforming the first reference timing signal to a second reference timing signal, the second reference timing signal being phase and frequency locked to the first reference timing signal;
• and
• supplying the second reference timing signal to clock the second communication network.