A system (100, 500, 600, 800) of ink and multi-channel data delivery includes an optically transmissive tubular body (113) having at least two ends (105, 107). The tubular body (113) defines an ink channel between an ink supply (101) and at least one inkjet pen (117, 521, 525, 529, 901, 903). A multi-channel optical transmitter (111, 300, 400) is in optical communication with one end (105, 107) of the tubular body (113), and an optical receiver (115, 509, 511, 513) is in optical communication with another end (105, 107) of the tubular body (113).