Nothing off the top of my head that's succinct and readable.
You'd do well to paw through the Bell Systems Technical Journal -- there's some amazing stuff in there like the origins of Unix and C [1], or Shannon's information theorem [2] -- but some details of the network itself are either hard to search for, or might not be there at all.
Most of the old phreak philes are focused on the billing and routing aspects of the network, not so much on transport. I remember a few test equipment manuals had good introductions to the structure of a T1 frame, for instance, but perhaps not an exhaustive treatment of how that came to be.
This is an interesting question. It must be out there, mustn't it?
You'd do well to paw through the Bell Systems Technical Journal -- there's some amazing stuff in there like the origins of Unix and C [1], or Shannon's information theorem [2] -- but some details of the network itself are either hard to search for, or might not be there at all.
1: https://archive.org/details/bstj57-6-1991
2: https://archive.org/details/bstj27-4-623
Most of the old phreak philes are focused on the billing and routing aspects of the network, not so much on transport. I remember a few test equipment manuals had good introductions to the structure of a T1 frame, for instance, but perhaps not an exhaustive treatment of how that came to be.
This is an interesting question. It must be out there, mustn't it?