A TP1 line consists out of maximum 4 TP1 segments.
In case more than one segment is required:
- one line repeater per extra segment is required
- one TP1 choke per extra segment is required
Couplers vs. (regular) devices
In order the calculate the line capacity for devices, the capacity taken by couplers and repeaters needs to be taken into account.
To set up a full ranged TP1 line, its first TP1 line segment need to be connected to 3 additional TP1 line segments. The 3 additional TP1 line segments are connected to the first TP1 line segment via 3 TP1/TP1 couplers. The primary side of all 3 TP1/TP1 couplers need to be connected to the first TP1 line segment. This mean that the 3 additional TP1 line segments are put in parallel, it is not allowed to put them in cascade.
Maximum capacity: segment 1 + segment 2 + segment 3 + segment 4
The capacity taken by the 3 TP1/TP1 couplers from the line (primary side + secondary side) is 3 * 2 = 6 devices.
This brings the maximum capacity of a TP1 line to: (4 x 64) - 6 = 250 devices.