From: Dorian Kim <dorian@blackrose.org>
A T1 is capable of achieving 1536 kbps maximum (24 x 64 kbps).
While this doesn't seem to apply to Tony's case, I wouldn't make a blanket statements like that. If the T1 is provisioned ESF, yes you can get 1536 kbps, but there are places where you still can only get SF/D4 framing. Precisely. The most likely explanation is that the T1 is actually D4 framed, which gives it a throughput of (24 * 56kbps) == 1344k. Or the T1 may be properly provisioned but the CSU/DSUs incorrectly configured for the old-fashioned framing (I think I saw this working at one point, can't remember for sure). The PPP is hardly eating anything at all in the grand scheme of things. ---Rob