whalesong
n. The peculiar clicking and whooshing sounds made by a
PEP modem such as the Telebit Trailblazer as it tries to
synchronize with another PEP modem for their special high-speed
mode. This sound isn't anything like the normal two-tone handshake
between conventional modems and is instantly recognizable to anyone
who has heard it more than once. It sounds, in fact, very much
like whale songs. This noise is also called "the moose call" or
"moose tones".