Alpha-numeric sequencer
An alpha-numeric sequencer was a device primarily used in engineering of  starships, used to decipher garbled communications and enable visual contact.

In 2372, Captain Kathryn Janeway tried to contact a duplicated , created by a subspace divergence field, but had no success. However, the other Voyager had been able to lock on to their counterpart's frequency via a rotating band pulse sent by chief engineer B'Elanna Torres. Janeway had Torres run the communications frequency into an alpha-numeric sequencer, which then allowed the two crews to talk to each other via a viewscreen. ()

Engineering tools