mfn002 said:
:lol: They can't even get their own radios to work reliably!
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Ma/COM OpenSky
- Thread starter Jimmy252
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:lol: They can't even get their own radios to work reliably!
i wouldn't look foward to scanning in NY. this is a tdma ip network supplying 4 time slots for data and voice. in NY there is dual layer of encryption. 1 256bit not shure of the other. even if you had a macom radio you still need to break the encription. but most of all we are all forgeting about cells. the system works in cells. "a" cell calls "c" cell and "b" cell hears nothing unless there is a request by a valid radio in "b" cell. even if you could break the encryption to hear audio. you need a request (valid radio)in your cell. NY has a big intrest in the network being secure. IT IS A NETWORK!!! every radio has its own mac address. yes it is a mac address.
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N_Jay
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Yes, we know. It's called OpenSky!ar5crash said:
Are you sure it is all running encryption?ar5crash said:
Yes, this has been mentioned quite often as one of the big reasons most cellular like systems (opensky and iDEN) will never have scanners.ar5crash said:
Address yes, I would hardly call it a MAC, it is more like an ESN.ar5crash said:
But other than that you are right on the money!
MASTR-V
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N_Jay said:
Well, the radios do have an ESN, but they are addressed on the OpenSky network using an IP address.
You ought to see one of those radios register on the network - there are about 5-10 transmissions made by the radio! A far fetch from the one short "login" message on EDACS.
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N_Jay
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Yep, I know they use IP addressing (layer 3), but I don't think they use MAC (layer 2).MASTR-V said:
Would love to know if I am wrong.
Of course! IP is a verbose and "chatty" protocol, and that is one of the reasons it is not a good radio protocol.MASTR-V said:You ought to see one of those radios register on the network - there are about 5-10 transmissions made by the radio! A far fetch from the one short "login" message on EDACS.
However with that said, it does seem that M/A-COM has it working fairly well.
MASTR-V
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To add a user to the NAS database, the only information that is radio-centric that must be entered is the ESN, and that gets paired with a static IP address. Historically in computing, MAC addresses have been way too easy to clone, so I can see the reason that they don't use that to identify the radio. MAC addressing may be used as part of a background application on the radio or system, but nothing that I see has ever asked for a MAC address. It's all IP addresses or UDP ports, and UDP is mostly for consoles.
It certainly is chatty though! But no need to worry about battery life because of the low RF duty cycle of TDMA.
It certainly is chatty though! But no need to worry about battery life because of the low RF duty cycle of TDMA.
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radioron231
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I use an Opensky radio and my portable radio can attach on average to 3 to 5 different towers because of the overlap in coverage. If someone could build an opensky scanner it would be possible to listen to a large number of talkgroups. If the scanner can decode the signal it would have a lot of talkgroups to listen to.
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