What is the difference between IDSL and ADSL and SDSL?
ADSL is different from SDSL. For Symmetric DSL (SDSL), the upload and download speeds are the same. For Asymmetric DSL (ADSL), the upload and download speeds can be different. IDSL is available when you are more than 18,000 feet from the CO, and the speed is limited to 128K. GTI offers SDSL and IDSL service, though the speeds that are available to you ultimately depend on your distance from the phone company’s CO.