爱立新设备试题—问答题(技术室)..docVIP

INTRODUCTION TO MOBILE TELECOMMUNICATIONS AND GSM 1. The GSM frequency bands are:: a) GSM at 800 and 1800 MHz b) GSM at 800, 900, 1800 and 1900 Mhz c) GSM at 900, 1800 and 1900 MHz 2. MOU stands for: a) Mobile Operating Unit b) MObile Union (of GSM) c) Memorandum Of Understanding 3. Only one of the following statements is true, which one? GMSC functionality is invoked for a) all mobile terminated calls b) all voice calls from mobile stations c) only those subscribers who have moved location area d) all mobile originated calls 4. Only one of the following statements is true, which one? The HLR location information is always updated when a) the subscriber changes location area b) the MS is switched on c) the subscriber changes MSC Service Area 5. Which of the following events occur when the MS is turned on a) The MS scans all GSM frequencies looking for special channels called control channels and tunes to the strongest one b) The MS registers with the network and the status is changed to idle. c) If the present LA is different from the stored LA, a location update takes place OVERVIEW OF ERICSSON’S GSM SYSTEMS 1. Which Ericsson product is a BTS part of? ________________________________________________________ ________________________________________________________ 2. What network management product is Ericssons OSS based on? ________________________________________________________ ________________________________________________________ 3. Name any two of the most important management areas defined by TMN. ________________________________________________________ ________________________________________________________ 4. What Ericsson product is used to implement a message center? ________________________________________________________ ________________________________________________________ 5. Briefly explain the function of the Service Order Gateway (SOG). ________________________________________________________ ___________________________________________________