[asterisk-users] Local loopback vs SIP/IAX2

[Steve Finkelstein]

Hi all,

Would anyone be able to point me in the right direction as far as the
pros/cons of using a local loopback with a T1 provider, or just
peering with a company using SIP/IAX2 or my small office asterisk
setup?  I've seen setups in both scenarios.  The only potential pro of
the T1 that I can think of is quality of voice and having an SLA with
a provider.  Otherwise, are the costs justified?

Thanks for your input.

/sf