[cisco-voip] DID lines in US

[Varghese Thomas]

hello 

Anyone can help me on DID lines options available in US.

1. Does the local telecom provides DID via BRI,Analog line or T1 lines?

I know that they provide vi PRI, not sure the other options and hence the query.

If I have a T1 link to local telecom, can I use few channels for DID
and the rest for CO trunks?

Is it possible to bundle 4xBRIs for both DID & CO trunk. One of my
VoIP customer has 70 users at one site and they need DID. Going with
PRI is too much for them and hence looking for other smaller
alternatives.

Any hints, links will be very useful 

Thanks in advance.