[Asterisk-Users] Middle Ground between POTS and T1?

[Matthew T. O'Connor]

I was wondering if there was a middle ground between POTS lines and a 
T1.  I have a new office with a T1 line and while it's working well, 
it's a lot of money and we will never use anywhere near 23 lines at one 
time.  Is it possible to get a few ISDN lines or something and bundle 
them together?

Basically I would like to get the digital features of the T1 PRI (DID 
number, etc...) but smaller.

Thanks,

Matthew