.bp .NH Appendix A: Implementation of the channel routines .DS L .ft CW .ta 0.65i 1.3i 1.95i 2.6i 3.25i 3.9i 4.55i 5.2i 5.85i 6.5i .so channel.h.t .ft .DE .bp .DS L .ft CW .ta 0.65i 1.3i 1.95i 2.6i 3.25i 3.9i 4.55i 5.2i 5.85i 6.5i .so channel.c.t .ft .DE