Where I work we currently have 7 POTS lines and two crappy DSL connections (512/512K) (1.5M/128K).

We are in talks about obtaining a Dynamic 1.5M T1 service and connecting our phone system to that. I know very little about the reliability of T1's. Supposedly they are more reliable than POTS lines, but I find that hard to believe.

Anyone out there have real world experience with T1's? Are they more reliable than POTS lines or DSL lines?

Do you think spending $470/mo on a 1.5M T1 circuit and a $60 backup DSL line (1.5/128k) is necessary? Or even keeping an analog phone line?

As it stands switching to the T1 is going to cost us 9 to 14% more a month. So If I can ditch the $60 dsl line it puts us about par with our current setup. -3% to 1% more a month.