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There are a number of ways to interconnect depending on your usage. -- Eric Chamberlain, CISSP Chief Technical Officer Voxilla - http://voxilla.com/ _____ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Douglas Garstang Sent: Friday, August 03, 2007 10:16 AM To: [email protected] Subject: [asterisk-biz] Mobile Termination via GSM Gateways I was reading that if you want to terminate to cell phones, that sending the calls through a GSM (or whatever technology is locally available) gateway, is cheaper than sending the calls to the PSTN via T1/E1, Analog. How is that? I'm not sure how these devices work anyway. Does the gateway appear as a regular cell phone to the mobile network? Would you just purchase an unlimited plan from the cell phone provider? Is that how it works out cheaper? I also see specs saying that the devices support a certain number of SIM cards. Why do you need SIM cards? Does each port on the gateway appear as a separate mobile phone? Would that mean if your gateway supported 8 ports, you'd need to purchase 8 unlimited mobile phone plans? Do ITSP's generally terminate calls to cell phone networks via GSM gateways or T1/Analog gateways? If they terminated calls via GSM gateways, the calls should be pretty cheap, but I see that ITSP's published rates to cell phones are always a lot more expensive anyway. Doug.
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