Substantial period definition
Substantial period means somewhere between six months and two years depending on exactly how competition emerges, but in this case the relevant time period most likely would be found to be one year.2 That is, the issue is whether high-speed internet access from wire-line telephone companies, wireless services and cable systems is likely to be provided on comparable terms and with comparable quality within a year after the first service is launched, which is usually cable modem access but sometimes is either DSL over telephone lines or wireless access. If the answer to this question is in the affirmative, then the access alternatives that could enter within year are in the same relevant market as the initial entrant.