All Digivoice video handsets are replaced by the hands-free 'Imago' monitor.
The Imago monitor part number is 1707/1 and the wall connection bracket is 1707/94.
The replacement hands-free monitor will require an additional connection between MU on the 1038/35 Decoder and MU on the 1707/94 connection bracket.
Note - remove protective film from 1707/1 monitor. Failure to do so results in high pitched screeching over the conversation.