[Asterisk-Users] Which Wildcard?

[Dmitry Ivanov]

Hello!

We consider purchasing Digium Wildcard for E1 connectivity. Wildcards 
are pretty expensive pieces of silicon for small shop like ours. And we 
have no previous experience with E1 communications.

What Wildcard do we need? How can we estimate our needs? How many 
clients (approx.) can share one E1 in practice, for example?

What about hardware echo cancelation? Do we really need it?

Thanks!