????? ??????? ?????? ?????? ???? ??????? ??????

????? ??????? ?????? ?????? ???? ??????? ??????

????? ??? ??????? ?????? ???????? ?????? ???????? ????? ???? ????? ??? ???? ?????? ?? ????????? ??? ????? ???????? ???????? ???????? ????????. ???? ????? ?????? ??? ?????? ??????? ?????? ????? ???? ???????.

???? ??????? ?????? ?? ???? ???? ??? ??? ??????? ?????? ???? ??????? ????? ????????. ??? ??? ???????? ???????? ???? ?????? ?????? ??? ??? ?????? ???????? ?? ????? ??????? ?????? ????. ??????? ???? ??????? ??????? ???? ????????: ????? ?????? ?????? ????????.

1. ????? ??????? ??????

1. ??? ???????? ??? RS485

??? ??????? ????? ??? ???? ??????? ????? ?????? ?????? ????? ????? ?????? ?? ??? ???????? ??????? ?????. ?????? RS-485 ??????? ???????? ?????????? ????????? ??? ??????? ?? ??? ????? ????? ???????. ?????? ??? ???? ????? ???? ??????? ?????????? ??????? ?????? ??? ????? ?????? ???????? ???????? ??? 200 ???? ????? ??? ???? ???????? ????? ??????? ?? ?????? ??? ??? ?????????. ??????? ??? ???? ????? ????? ?? RS-485 ??? 1200 ???? ????? ???? ??? ?????? ?? 10 ?????? ?? ???????. ??? ?? ????? ??????? ?? ????????? ??????? ????? ????? ?????? ??????? ?????? ???????? ???????.

2. ??? ???????? ??? ????????

???????? ????? ????? ????? ???????. ???? ????? IEEE 802.3? ?????? ?? ???? ?????? ???????? ????????????? (IEEE)? ??????? ?????? ????????? ????? ???? ????? ???? ??????? ??????????? ????????? ???? ??????? ???????????? ????????? ???? ?????? ??? ???????. ???? ???????? ?????? ???? ?????? ??????? ??????? ?????????. ?????????? ??? ???? ?????? ??? ???? ??????? ????? ?????? ??? ??? ???? RS485? ??? ????? ???? ????? ????? ??? ???? ??????? ???????? ????? ??????? ????? ??????? ???????? ????? ????? ?????? ?????????.

??????? ????? ??????? ????????

1- ??? ???????? ??? ???? GPRS

???? GPRS ?? ????? ????? ??????? ???? ???????? ????? ??? ????? ?????. ??? ?????? ??????? ????? ??????? ?????? ????? (General Packet Radio Service). ????? ??? ?????? ????? ???????? ?? ????? ?????? (2G) ??? ????? ?????? (3G)? ??? ???? ??? ?????? ????? ?????? ??? ???? GSM. ???? ??? ????? ??????? GSM ?????? ?????? ????? ??? ?????. ??? ?????? ???? ??? ???? ???????? ??????? ???????? ???????? ??????? ?????? ??? ???? ?????? ????? ???? ????? ????? ?? ???????? ?? ??? ???????.

????? ??????? ????? GPRS ???? ???????? ???????? ???????:

(1) ???? ???? ????

???? ????? GPRS ????? ????? GSM ???????? ????? ?????? ????? ????? ??????? ????? ????????? ??? ????? ??????? ????? ????????? ?? ???? ???? ?????? ??? ???? ?????? ?? ??? ?????? ?????? ????????.

(2) ???? ??? ????

???? ?? ??? ??? ?????? ??????? ??????? ????? GPRS ??? 171.2 ??????/?????? ????? ?????? ??? ?????? ??????? ??????? ????????? ??? 40 ?100 ??????/?????. ???? ???? ???????? ??????? ?????????? ???? ????.

(3) ????? ???? ????

??? ?????? ?????? ??? ???? GPRS ????? ????? ????? ??????? ?????.

(4) ???? ????????? ??????

???? ?????????? ??? ????? ??????? ?? ?? ???? ??? ?? ???? ??? ???? ???? ???? ????????? ??? ?????? ??? ????? ???????? ??? ???? ?????? ??? ?????? ?????? ???????.

(5) ????? ??? ???? ??????

?? ?????? ???????? ????? ?????? ????????? ??? ????? ????? ?? ??????? ????????? ???? ?????? ?????? ????? ????? ???? ????????. ??? ?? ??? ??? ???? ???? ????????? ??? ??? ?????? ?? ????.

?? ??? ??? ???????? ????? ??????? ??????? ???? ?????? ??? ??????? ??????? ????? ?????? ????????. ????? ????? ?????? ??????? ????????? ????? ?????? ?? ?? ????? ??? ????? ?????? ??? ???????? ?????? ???????? ??? ????????. ??? ????? ????????? ?????? ???? ??? ?????? ?????? ??? ?????? ?????? ?????? ??????? ???? ?????? ?????? ??????. ??? ????? ????? ?? ??????? ??? ???????? ??????? ??????? ?????? ????????. ??? ??? ????? ??????? ??? ????? ???? ?????? ??? ???? ??????.

????? ???? ????? ???? ??????????? ??????????? ???????? ?? ??????? ?????? ???????? ????? ????? ??? ????? ??????? ???????? ??????.

????? ????? ??? ?? ????????? ????? ??????? ?????? ?? ???????. ???? ?? ???? ???? ??????? ??? ????? ???? ?? ????? ??????? ????????? ???????? ????? ?????? ??????? ???? ??????? ??????? ??? ??? ???.

????? ???? ????? ???? ????? ????? ?? ????? ????? ???????? ??? ???? ????? ?? ???? ????? ?????????.

???? ?? ?????????? ???????? ??????????? ????????? ?????? ?????????? ?????? ???????? ??? ?????? ?????? ?????? ????? ???? ??????? ?????? ???????? ????????.

???? ???? ????? ???? ??????????? ??????????? ???????? ?????? ??? ????? ??????? ?????? ????.