There are many interfaces between each component in telecom network. Each interface has been given a specific name in telecom network. Telecom engineer should remember name of interfaces to work effectively. Below are most of the interfaces used in telecom network:
Interface between MSC and MSC is G CP (G control part) interface.
A mobile user enters into new MSC area then new MSC use this interface to get information from OLD MSC.
USSD service is mostly like SMS service. Read below to understand more:
SMS deliver messages using store and forward technique:
A message is always first sent to short message service center (SMSC) before message get deliver to the recipient. The sender receives a deliver confirmation once message was successfully received by SMSC. Message is not guaranteed to reach the destination user instantly.
Mobile station consist of two parts i.e. handset and a Subscriber Identity Module (SIM).
SIM stores integrated circuit card identifier (ICCID), International mobile subscriber identity (IMSI) and Authentication key (Ki -128bit) which is used to identify and authenticate subscriber in network. Refer further details on SIM card here.
The range and coverage area of a mobile station depend on the output power of mobile.
It’s area of radio coverage by a mobile tower. Each cell is assigned a unique number called Cell Global Identity (CGI).
LOCATION AREA (LA)
Mobile network identify location of a mobile station using location area identity. It is defined as a group of cells. Location area of a mobile station is always stored in VLR. This is used in routing of mobile call.