Welcome to Our WirelessAdvisor Community!

You are viewing our forums as a GUEST. Please join us so you can post and view all the pictures.
Registration is easy, fast and FREE!

Why is higher freq. being used to deploy GSM?

Discussion in 'Northeastern US Wireless Forum' started by rockon83, Oct 15, 2002.

  1. rockon83

    rockon83 Junior Member
    Junior Member

    Joined:
    Jul 28, 2002
    Messages:
    133
    Likes Received:
    0
    A major advantage of TDMA is that it's used mainly on 800 MHz which provides better coverage than the higher frequencies. So why is GSM rolling out at 1900 MHz, and not at 800 MHz???
     
  2. Mike

    Mike Senior Member
    Senior Member

    Joined:
    Jun 7, 2002
    Messages:
    282
    Likes Received:
    0
    Location:
    Tampa Bay Area
    My Phone:
    Motorola RAZR V3
    Wireless Provider(s):
    T-Mobile, Verizon, Cingular
    I don't think there are any 850 Mhz GSM phones out yet that would let you use that band. Several have been announced but I don't think any are out yet.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  3. ZaphodB

    ZaphodB Signal Go Down De Hole...
    Senior Member

    Joined:
    Aug 13, 2002
    Messages:
    3,236
    Likes Received:
    2
    Location:
    OC (USA) / 77 (FR)
    My Phone:
    LG VX5600
    Wireless Provider(s):
    Verizon(US) Orange(FR)
    In the case of T-Mobile, they got 1900 MHz frequency ('PCS') which means they don't have to support analog (AMPS) - all 800MHz carriers in the U.S. and Canadia must support analog until 2007.
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...
  4. emag0rad

    emag0rad Senior Member
    Senior Member

    Joined:
    Sep 9, 2002
    Messages:
    287
    Likes Received:
    0
    First I must clarify that a carrier can't just to deploy on any band it chooses. It must have a licence for that band in a particular market.
    In AT&T's case for example, it may have only a license for 1900 in a market or only a license for 800 in a market or it may have licenses for both 800 and 1900 in a market. AT&T will deploy GSM 1900 first because of the availability of handsets for that band. For its 800 only markets AT&T (this applies to Cingular as well) will "carve off" spectrum from its TDMA network and use this spectrum to deploy its GSM 800 network.

    GSM 800/1900 dual band phones will be the norm in the future for U.S. GSM carriers.
    GSM 800 will be the prevelant band in the U.S. within the next 1 to 2 years.
    GSM 800 does exist and works nicely - I use a Nokia 3590 daily on GSM 800.

    GSM 800/1900 Dual-band Appetizer:

    Disclaimer: This is not by any means a complete list. I am not liable for any errors or "anticipational let downs". Take all of this with a grain of salt, lime and Tequilla.

    Nokia:
    3590 (GSM 800/1900, GPRS, Java)
    6590 (GSM 800/1900, GPRS, MMS)
    6340i (GAIT: GSM 850/1900, TDMA 850/1900, AMPS)

    Motorola:
    C331g (GSM 850/1900, GPRS)
    T720 (GSM 850/1900, GPRS, Java, Color display)

    SonyEricsson:
    T62u (GAIT: GAIT: GSM 850/1900, TDMA 850/1900, AMPS, GPRS)

    Siemens :
    CT56(GSM 800/1900, GPRS, Java), A56 (GSM 800/1900)

    Sendo :
    S251 (GSM 800/1900, GPRS)

    Samsung:
    S107 (GSM 800/1900, GPRS, Java)
     
  5. bobolito

    bobolito Diamond Senior Member
    Senior Member

    Joined:
    May 3, 2002
    Messages:
    12,735
    Cell Tower Picture Gallery:
    50
    Likes Received:
    53
    Location:
    in front of my computer
    My Phone:
    iPhone SE
    Wireless Provider(s):
    T-Mobile
    Properly deployed, 1900Mhz systems can provide coverage just as good as 800Mhz systems. They just need sites placed closer together which means more tower density. As to why wasn't GSM deployed at 800Mhz, its because when GSM came to the US, existing carriers were already using TDMA, CDMA or analog at 800Mhz so no more room was left to implement a new network. They had to choose 1900Mhz which was what the FCC allocated for wireless network expansion. Now that the GSM fever came along, TDMA carriers will be migrating their TDMA systems to GSM whether they are at 800Mhz or 1900Mhz so there will be both 800 and 1900 GSM like TDMA 800 and 1900 is today and then eventually TDMA will be on its way out to be replaced by GSM entirely. There are many phones coming that will support GSM 800. Availability may be as soon as next month.

    Nokia 3590
    Nokia 6590
    Nokia 6340i
    Ericsson T62u
    Motorola C332 / C331g
    Motorola T720
    Siemens C56
    NEC MP6J1E1-1E/F
     
    Stop hovering to collapse... Click to collapse... Hover to expand... Click to expand...

Share This Page

Copyright 1997-2022 Wireless Advisor™, LLC. All rights reserved. All registered and unregistered trademarks are the property of their respective holders.
WirelessAdvisor.com is not associated by ownership or membership with any cellular, PCS or wireless service provider companies and is not meant to be an endorsement of any company or service. Some links on these pages may be paid advertising or paid affiliate programs.

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice