Tape relay
In
telecommunication, a
tape relay is a method of retransmitting
TTY traffic from one
channel to another, in which messages arriving on an incoming channel are recorded in the form of perforated tape, this tape then being either fed directly and automatically into an outgoing channel, or manually transferred to an automatic transmitter for
transmission on an outgoing channel.
Source: from Federal Standard 1037C and from MIL-STD-188