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what is LCR and where it is used ? RRS feed

Answers

  • LCR stands for Least Cost Routing and is used in routing devices such as computer network switches, physical network routers, telephone exchange, private branch exchange, etc..

    In LCR, a routing table is created. this table is stored in the memory of device.

    lets talk about private phone exchange.

    whenever we try to make a call, the PBX identifies that what type of call it is. if all the line are of same cost, it allocates us any free line.

    but in case there is any difference, the PBX first tries lines that will cost low from the routing table. if line is not available, it will try for next level. this will continue in the form of a cycle till it doesn't find a free line.

    Friday, March 16, 2007 12:51 PM
  • LCR is not coded in any language. it's just like storing values in hardware, as we store phone numbers in mobile.

    the LCR table can be changed only by the administrator. As i'm a PBX programmer, i can tell you the way how to do it.

    in private telephone exchanges, trunk groups are created for the lines that have same kind of rates. these rates are then used to program the system. whenever system (PBX) receives any number to dial, it checks in which category the number falls. on the basis of the category, the number is dialled using appropriate trunk group.

    the mapping of trunk group and the sequence of numbers is decided by the system administrator. generally, 1st 4 digits are checked (at max) by the PBX to decide the group from which to dial the number.

    Saturday, March 17, 2007 9:45 AM

All replies

  • LCR stands for Least Cost Routing and is used in routing devices such as computer network switches, physical network routers, telephone exchange, private branch exchange, etc..

    In LCR, a routing table is created. this table is stored in the memory of device.

    lets talk about private phone exchange.

    whenever we try to make a call, the PBX identifies that what type of call it is. if all the line are of same cost, it allocates us any free line.

    but in case there is any difference, the PBX first tries lines that will cost low from the routing table. if line is not available, it will try for next level. this will continue in the form of a cycle till it doesn't find a free line.

    Friday, March 16, 2007 12:51 PM
  • Well its a nice piece of information but how does it work??? and its being coded in which language???
    Saturday, March 17, 2007 5:11 AM
  •  Sanket_Shah_734609 wrote:
    what is LCR and where it is used ?

    tell us more about this....

    Saturday, March 17, 2007 5:43 AM
  • LCR is not coded in any language. it's just like storing values in hardware, as we store phone numbers in mobile.

    the LCR table can be changed only by the administrator. As i'm a PBX programmer, i can tell you the way how to do it.

    in private telephone exchanges, trunk groups are created for the lines that have same kind of rates. these rates are then used to program the system. whenever system (PBX) receives any number to dial, it checks in which category the number falls. on the basis of the category, the number is dialled using appropriate trunk group.

    the mapping of trunk group and the sequence of numbers is decided by the system administrator. generally, 1st 4 digits are checked (at max) by the PBX to decide the group from which to dial the number.

    Saturday, March 17, 2007 9:45 AM