1. Exetel does not deploy its own infrastructure outside of its own switching centres . 2. The network consisted of switching centres , transmission facilities and subscriber terminals. 3. A Remote Switching Centre ( RSC ) has limited capability. 4. The site operates as a switching centre , underpinning the company's network between Leeds and Edinburgh. 5. The base station is controlled through the Base Station Controller via the Mobile Switching Centre . 6. In a message-switching centre an incoming message is not lost when the required outgoing route is busy. 7. GEC provided Sector Switching Centres in the London director area at Ilford, Wood Green, Colindale, Ealing, Kingston, Croydon and Eltham. 8. The " 2 out of 6 " frequency code was used to pass digits forward between Registers in traditional International Switching Centres . 9. The protocol will be used for the transmission between the radio base stations and the mobile switching centre via the base station controllers. 10. TRI has set up one mobile switching centre , one base station controller and 20 Radio Base Stations with a capacity of 20, 000 which is expandable.
Mobile