A data transmission apparatus and method used in resilient multiple
service ring, including a first working ring and a second working ring,
for transmitting data between physical layer side device and network
layer device or other upper layer facilities, such as carrier class node
equipments, core and edge routers, switch devices, IP based network
accessing equipments, line cards, and interfacing units used in high
rates or low rates, e.g. Ethernet, Gigabit Ethernet, 10 Gigabit,
Ethernet, DVB (MPEG1, MPEG2, MPEG4 and MPEG7), ATM, Packet over SDH/SONET
transmissions, other MSR, RPR for adapting IP and various tributaries
(Ethernet,) directly to SDH/SONET or simplified SDH/SONET, or Gigabit
Ethernet, 10 Gigabit Ethernet, or other physical layer devices.