The Plus/4 was later used in Denmark, as part of a bundled product from the then-national telecompany (now TDC A/S) to help hearing-impaired people communicate over telephone lines. Outgoing calls were made from the Plus/4 via modem to a call center where a service assistant would read the written input from the user, call the other party and read the text aloud. Vice versa, incoming calls could be made from other users to the call center, who would dial the Plus/4 modem. A strobe light connected to the Plus/4 would notify the hearing impaired about the incoming call. The Plus/4 enjoyed lasting popularity in Hungary due to CBM's decision to saturate the Central European market with the failed product at a greatly reduced price. A number of unofficial ports of C64 games were produced by Hungarian users.