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callout from energy meter

I am working on a project called AMR (automatic meter reading) in this project, we are making a call from meter software through MODEM to the remote energy meter having GPRS MODUM with SIM card. after authentation we can take the energy data from remote meter. Now i planing to remove this modum placed at central end and use some equipment for making this call through PRI lines.

RAS box is under consideration, any one have some new ideas abut this

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Re: callout from energy meter

To make calls through PRI lines Cisco IP/VC 3525 Gateway would also be a better option.The Cisco IP/VC 3525 Gateway resides on the LAN and allows LAN users to hold videoconference calls with WAN users connected across ISDN PRI lines. The gateway is one element used in LAN videoconferencing.Refer the following URL for more information

http://www.cisco.com/en/US/products/hw/video/ps1870/products_user_guide_chapter09186a008007ee16.html

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