How much bandwidth does an internal call take up on the T1 circuit?
If the internal call is within the same building (i.e., phones behind one router), the phone conversation doesn’t use any T1 bandwidth. The initial signal setup, as the call is dialed, uses a minimal amount of bandwidth as the Covad central office (CO) prepares for action. But after the conversation starts, the packets stay within the building. So, if two cube neighbors are talking to one another and the T1 line goes down, their conversation will remain in progress.
