040000 tree ed2d56a06192c34cec93c64d37a0a4c2ea5feb72	backends
040000 tree d1b9d5923eb81ef58ab87404e33cb663ab693b0d	mock
040000 tree d56ce23521a05ec800824a7cb52c97cf942d1842	modem_chat
040000 tree da857014ee47e20cf8e7bb0ff2475fc734e62703	modem_cmux
040000 tree 065d08c3c7dc8fa6cc39f92f829295e0d753cf73	modem_cmux_pair
040000 tree 2e9191ca677a998268aafe7f81130d1bb8811339	modem_pipe
040000 tree 3a24bc6261204cd243d17240efa8d660d9952550	modem_pipelink
040000 tree d1439de8cbf11cb37bb3ba58ef424143f3cd6d2e	modem_ppp