Hi Bala,
These are two different models you can say for two diffent applications. Alcatel is using OCB sereis of switches for PSTN and transit application and they have given the name S12 for their switches which are being using in wireless network mainly GSM. Now even if you have some documents related hardware architecture and command stucture of OCB 293 switch please help me by sending. I need them for some specific purpose and your help will be highly apprecited.