I started installing a NEAX 31 in the Bronx VA in 1978. I set up the Anti-interface and was ready for NY Tel to install the VCAs. When the installer finally came out (in 1980! [The job got shut down for a year while they installed sprinklers that were left off the drawings!]) he let me know that because my PBX had already been installed on the Network without a VCA (GTE at Tampa International Airport) they were not going to be installing one for us.
I was ecstatic. They caused nothing but trouble. I think it was a little after that, that NY Tel did away with them completely.
Sam
