What does lac mean

1. Indians like to use lac as the unit of measurement:
an lac is 100000
sometimes they use lac to calculate the amount
US dollar one lac three thousand two hundred: 103200 US dollars

2.

Lac is called L2TP access concentrator

The lac is located between the remote dialing user and the LNs device and is responsible for the data forwarding between the remote dialing user and the LNs device

to forward data from lac to LNs, it is necessary to use L2TP protocol to establish a tunnel between the two devices, and PPP link is still used between lac and remote dial-up users

lac: Liberal Arts College

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extended data

the coding method of Lac has corresponding regulations in every country, and China Telecom has clear regulations on the coding method of Lac on GSM network (see the system specification of GSM of the Ministry of Posts and Telecommunications)

generally, the allocation and coding of Lac have been determined in the initial stage of network construction, and there are few changes in the operation process. The size of location area code (LAC) is a key factor in the system

if the lac coverage is too small, the location update process of the mobile station will increase, thus increasing the signaling traffic in the system

On the contrary, if the location area coverage is too large, the same paging message will be sent in many cells when the network paging mobile station, which will lead to the overload of PCH channel and increase the signaling traffic on Abis interface

e to the strong mobility and burst in mobile communication, there is no unified standard to adjust the size of location area. The operation Department can make long-term statistics on the PCH load and signaling link load of each region according to the current network to determine whether to adjust the size of the location area

if the former phenomenon is serious, the location area can be appropriately reced, otherwise, the location area can be appropriately increased. In general, it is suggested that the location area should be as large as possible

3. In economics, lac search is the long-run average cost
the long-term average cost is the total cost of a manufacturer per unit of proction in the long run. The formula is lac = LTC / Q< br />‍ The U-shaped long-term average cost is e to economies of scale and diseconomies of scale. Economies of scale: the economic benefits of manufacturers are improved by expanding proction scale, that is, the multiple of output increase is greater than that of cost increase. Diseconomy of scale: e to the large scale of manufacturers, the economic benefits decrease, that is, the increase multiple of output is less than the increase multiple of cost
external economy and external diseconomy lead to the upward or downward shift of long-term average cost. External economy: factors outside the enterprise make the enterprise cost decrease. External diseconomy: factors outside the enterprise make the enterprise cost rise.

4. Lac

(location area code)
lac: location area code (in mobile communication system) is an area set for paging, covering a geographical area. In the initial stage, it was generally divided by administrative area (a county or a district), but now it is very flexible, and it is divided by paging volume. When the paging volume of an lac reaches an early warning threshold, it must be split. In order to determine the location of the mobile station, the coverage area of each gsmplmn is divided into many location areas, and the location area code (LAC) is used to identify different location areas. A location area may contain one or more cells.

5. Lac: location area code (in mobile communication system), is an area set for paging, covering a geographical area. In the early days, it was generally divided by administrative area (a county or a district), but now it is very flexible, divided by paging volume. When the paging volume of an lac reaches an early warning threshold, it must be split. In order to determine the location of the mobile station, the coverage area of each gsmplmn is divided into many location areas, and the location area code (LAC) is used to identify different location areas. A location area may contain one or more cells.

6. In the typical VPDN network constructed by L2TP protocol, there are two parts: Lac and LNs. 1. Lac lac stands for L2TP access concentrator, which is attached to the switching network and has the capability of PPP end system and L2TP protocol processing. Lac is generally a network access server NAS, which is mainly used for PSTN / ISDN.

7. MNC: (mobile network code) is used to identify the mobile network to which the mobile customer belongs
MCC: Communication term, namely motor control center, also known as motor control center
lac: location area code (in mobile communication system) is an area set for paging, covering a geographical area and divided by paging volume
CID: charge injection device (CID) sensor.

8. ACC is the power on line, which is equivalent to a switch. It is usually used in acc. in addition, it is not one gear, it is two gear, that is, when the key is turned on to the window lifter, navigation and other electronic equipment, but it is not started, it is connected to the car acc. when the key is turned on, the power amplifier will be powered on when the instrument panel lights up. You can ask me all the car audio questions

9. Communication can be understood in this way, DBM refers to the signal level strength, lac refers to the location area, CI refers to the cell, the above DBM and lac said in great detail, in the communication system, CI is actually cell ID, which means cell identification, used to identify different mobile base station cells!

10. Cell number in the base station
you can know the location of the base station through the base station code, provided you have a table on hand, which is the information table of Unicom base station in the city where the mobile phone is currently located
if this mobile phone has been to other cities on the date when the call list is printed, it also needs the base station information table of other cities. With this table, we can know the approximate location. Lac parameter means large area, such as Gulou District and Jianye District in Nanjing.