040000 tree 657737547e7fee4ef060864905357c5c3cf3b28c	backends
040000 tree d1b9d5923eb81ef58ab87404e33cb663ab693b0d	mock
040000 tree ed57175151884ab64734c9a4b3856c41bdc0e954	modem_chat
040000 tree e79af7f86540b174ed4ea6dce3b695ecf19932b0	modem_cmux
040000 tree 67f10fe6442770fb2b6a93377cf39c8bf525193e	modem_cmux_pair
040000 tree a0a3f046701ca70cdf88482e16fc3da6fca0d50a	modem_pipe
040000 tree 70a348989bba39a47e7d73f10a9c944e00204a9a	modem_ppp