VoIP can be backed up by batteries and if connected to cable, it would still stay up as long as cable service is available and the batteries hold a charge. Wouldn't a cellular system require battery backup also? The only advantage to cellular is maybe that the wire can't be cut.
Well technically jaydubb, by your reasoning if the city is out of power hence no working TCP/IP, then your local cell towers could be down as well.
The only guaranteed connection is hard line (and this can be cut or go down if a line breaks somewhere). And even they require power. In most cases all three of these have backup power at the receiving end (not sure on that for all cell towers though I have seen it on some)
Everything else requires power on the receiving end including TCP/IP or cellular. This is why people have redundant capabilities, hard line AND cell line access.
DELInstallations what do you use for your clients in place of a C3?
Hmmm.... interesting points for sure.
I guess my main rebuttal is simply that I can recall many times when the city power was down, but I was still able to make calls on my cell phone.
Lou, did you actually have to buy a phone to get that GSM card or can you get it as a stand-alone?
Also, where would one buy this magical C3 device?
I use Telular, Uplink and also Connect 24. We've formerly used Alarmnet.Well technically jaydubb, by your reasoning if the city is out of power hence no working TCP/IP, then your local cell towers could be down as well.
The only guaranteed connection is hard line (and this can be cut or go down if a line breaks somewhere). And even they require power. In most cases all three of these have backup power at the receiving end (not sure on that for all cell towers though I have seen it on some)
Everything else requires power on the receiving end including TCP/IP or cellular. This is why people have redundant capabilities, hard line AND cell line access.
DELInstallations what do you use for your clients in place of a C3?