Why are there 2 EA field in Frame Relay and ISDN addressing?
If you look at the addresing format of ISDN and also Frame Realy, you would be amazed at seeing 2 fields of Extended Address bits in the address field. I know that they use only one bit to state which would use more bits (extended address). The bit is set to 0 or else with short address it is set to 1. Now why the 2ndEA bit in the address?
Any takers here?