The Pm3 supports both.
On Wed, 27 Aug 1997, Rick Rountree wrote:
> I've got my telco on the phone trying to bring up a PM3 on a CT1. When I
> do a sh line0 I get framing as ESF. The telco wants me to do SF instead.
> How do I make the PM3 do that? Doesn't the PM3 automatically detect framing?
>
> Rick Rountree
>