depends on media type between the buildings.. you can use analog stations as trunks on a bcm.. you can use dual pri cards with a msdl for pri's between the two. you can use a line side t1 card and a non pri t1 interface on the far end..
if you use the pri, you can have names and msg lamps to the remote site.. another high $ option is adding an ip cab at the far end.. that puts a 10 card cab at the far end of any network cable.. may be overkill, but not much more then the bcm and pri cards
john poole
bellsouth business
columbia,sc