sms system with plc

hi all,

i am working on project of controlling the lighting of a whole city via plcs s7-300 and s7-400, the point that i need to connect all these plcs together via a dependent network (not GSM)like bluetooth ,RF or Zigbee. my question is that is it possible to so and which way is the best also can i make i control the operation controlled by the plc via sending SMS to the plc and this ofcourse will be over the dependent network i created ??

please i need answers quickly as i have to make an offer within 2 days to my client

How big is the city?
How many streetlights?

Dan Bentler

We have the Smart Cellular modem. which have the PLC Alarm to a mobile phone or PC.please check the link, hope it can help you get some ideal http://www.robustel.com/News/newsletters/PLC_GSM_SMS_GPRS_Modem.html

I wonder if sarah got the job and Alexandri, Egypt now has PLC-controlled street lights?

Also I want to know Sarah how to solve this question final?