The best replacement for t1 is dsl.

The best alternatives to t1 are rated as following:
★★★★★  dsl
★★★★★  t3
★★★★★  cable
★★★  t2 mri
★★  t2
★★  e1
★★  pri
★  fios
★  ethernet
★  ds3
★  t3 faster
★  m4
★  ds1
  fiber
  h1
  broadband
  m4 wot
  cable modem
  cable internet
  hd800
  dsl speed
  adsl
  sherman
  t2 weighted
  t3 line
  cable broadband
  fiber optic
  sennheiser hd800
  isdn
  frame relay
  t3 lines

Your alternative for t1 is not listed? Suggest!
Speaking about t1, one probably shouldn't forget about 3x magnifier.

Other search terms related to t1 and their ratings are:
★★★★★ 3x magnifier
★★ eotech magnifier
★ frame relay
You have in mind a companion for t1 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of t1 in all years. Click on graph for more.
t1
dsl
t3