If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#21
|
|||
|
|||
Gord Beaman wrote:
David Lesher wrote: Yup! Gord is correct... that is what the industry is saying. However, I believe the FCC is still with the old nomenclature vis-a-vis Mobile Phone vs Cell. Jer/ Eberhard {posted at Jer's request; he has ...an oil leak on his server, yea, that's it..} Of course...and the term is no longer 'cellular' anyway it seems, they now seem to prefer 'Mobile phones' so I guess it's a moot point, but ISTM that the aircraft cel system is a helluva lot closer to the terrestrial cel system than anything else. No. "Mobile phones" is an entirely separate service, running in the 152 Mhz and 450 Mhz bands... this is what we had BEFORE cell phones. :-) I was a "Mobile phone" dispatcher when I was at university... 1970 - 1974. :-) Best regards, Jer/ "Flight instruction and mountain flying are my vocation!" Eberhard Yes, you're quite correct in what you say about the old 'Mobile phones'. I was the chief (only) tech for a small communications company where we installed 'Key telephone systems' and Mobile Car Phones', BUT I was just pointing out that the cellular phone companies 'now' call them 'mobile phones' (again?). I have a brand new handout sheet here for the kind of cel phone that I'm interested in exchanging for my present one...remember that I said NEW handout...it calls them 'mobile phones'...I'll scan it and email it to you if you cannot take my word for it... -- -Gord. (use gordon in email) Best regards, Jer/ "Flight instruction and mountain flying are my vocation!" Eberhard -- Jer/ (Slash) Eberhard, Mountain Flying Aviation, LTD, Ft Collins, CO CELL 970 231-6325 EMAIL jer'at'frii.com WEB http://users.frii.com/jer/ C-206 N9513G, CFII Airplane&Glider, FAA-DEN Aviation Safety Counselor CAP-CO Mission&Aircraft CheckPilot, BM218 HAM N0FZD, 221 Young Eagles! |
#22
|
|||
|
|||
On Sun, 09 Jan 2005 19:01:30 GMT, Gord Beaman
wrote: Of course...and the term is no longer 'cellular' anyway it seems, they now seem to prefer 'Mobile phones' so I guess it's a moot point, but ISTM that the aircraft cel system is a helluva lot closer to the terrestrial cel system than anything else. The term "cellular" has a specific meaning within the FCC rules. There is a section of the rules (I forget which one) that regulates the "cellular service", and another section of the rules that regulates PCS phones (the "personal communications service"). The former is not allowed to be used in the air whereas the latter is. A few years ago there was a company that was experimenting with ways to use the "cellular service" from the air without bringing up too many cells, etc. They were working with a special waiver from the FCC. I don't know what all ever became of their work. CJ |
#23
|
|||
|
|||
Cell towers do not work individually, each tower only has a few
channels of the huge amout of frequencies available. Your cell phone simply picks the strongest available frequency. That is usually the nearest cell tower, but if all available channels are in use that may be the next nearest tower. There are not just cells but also regions of cell towers, each region will use all of the available channels and have a limited number of land lines available to it. The problem occures when the cell phone access several regions with several towers of the same frequency. Aircell phones have a lower power and a shaped antenna giving a norrow beam down to the ground. |
#24
|
|||
|
|||
I understand that AirCell phones use the same system as regular cell
phones. There is a special antenna on the aircraft which gives a lower power shaped transmission which cannot broadcast past the existing cell region. Each region is made up of a network of cell phones. They may have some dedicated frequencies or channels but they use the same network of cell towers and regions. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
PC flight simulators | Bjørnar Bolsøy | Military Aviation | 178 | December 14th 03 12:14 PM |
Homebuilt Aircraft Frequently Asked Questions (FAQ) | Ron Wanttaja | Home Built | 0 | October 2nd 03 03:07 AM |
USAF = US Amphetamine Fools | RT | Military Aviation | 104 | September 25th 03 03:17 PM |
Homebuilt Aircraft Frequently Asked Questions (FAQ) | Ron Wanttaja | Home Built | 4 | August 7th 03 05:12 AM |
Homebuilt Aircraft Frequently-Asked Questions (FAQ) | Ron Wanttaja | Home Built | 0 | July 4th 03 04:50 PM |