passenger intercom system

Which ofthe nyc subway cars have the passenger intercom system where riders can use to talk to conductor/motorman in case of emergency?

I know the R142 has them, I'm not sure what other models have them.

I don't think any of the others (except the R142 and R160) have that feature.

Only the R142, R142A, R 143 and R160 cars are equipped with a passenger intercom.

It is safe to say that it will be standard equipment for all new cars.

I recall there was a test of some sort on some R42s on the J line but it didn't work.

Ten R42 cars had a pilot test program in 1995 but was later removed due to false alarms and poor performance.

The R110 test models of the mid-1990s also had passenger intercom systems.

7 Train wrote:Ten R42 cars had a pilot test program in 1995 but was later removed due to false alarms and poor performance.

By "false alarms" do you mean that the system malfunctioned, or that people unnecessarily used the system for non-emergencies?