In 1980 the California School for the Deaf moved from Berkeley (land grab) to Fremont. Fremont's deaf community grew quickly and the city adapted. Bird calls at signals to let them know which of the two directions had a green walk (Chirp and Cuckoo). The deaf were  real happy with the Fremont Police. The police department taught all the officers  some basic sign language. When a deaf person was pulled over they generally were just waved off before because the officer could not communicate with them. NOW in Fremont they started to actually get tickets. Horrible.

My practice took on deaf clients, in part because my wife volunteered at CSD Fremont. We need a telephone communication with the deaf so we got something very much like the photo in this article https://gallaudet.edu/museum/exhibits/history-through-deaf-eyes/awareness-access-and-change/how-ttys... known as a TTY. It weighed ALOT! Noisy! Slow! but it was the only thing other than a relay service where there was a 3rd party with TTY who translated. 

Ah, those were the good old days.