en102
Canadian, eh?
join:2001-01-26
Valencia, CA
 ·RoadRunner Cable
 ·DSL EXTREME
·DSL EXTREME
| reply to odreian615
Re: I wonder if thier HSDPA can work with Cingular's
They need to use somewhat different frequencies.
T-Mobile UMTS USA = 2100/1700MHz
Cingular UMTS = 850MHz and 1900 MHz
GSM/UMTS phones exist using the following frequencies
GSM: 850, 900, 1800, 1900 (and officially 450MHz in some countries)
UMTS: 850, 900, 1900, 2100/1900MHz and 2100/1700MHz.
The 'primary' UMTS global frequency is 2100/1900MHz
850, 900, 1900 MHz is existing GSM (or cellular/PCS) frequencies. |
|
jervin123
join:2005-04-14
Philadelphia, PA | forgot 1800 mhz and only reason we use 850/1900 is because the fcc gave 900/1800 to diffrent stuff |
|
en102
Canadian, eh?
join:2001-01-26
Valencia, CA
·RoadRunner Cable
·DSL EXTREME
·DSL EXTREME
| 1800 MHz is used in GSM, but hasn't been set for UMTS
900 MHz has already been tested in Europe for UMTS.
850/1900 devices for UMTS already exist
2100/1900 devices for UMTS already exist
2100/1700 - new, but scheduled.
There's a lot of fragmentation going on. |
|
jervin123
join:2005-04-14
Philadelphia, PA | once some more spectrum is cleared up in the 1800 mhz band which is being used by the mil. right now to the best of my knowledge we might see networks starting to form on par with the world. |
|
