NT8D09BA 16 Port Analog Circuit Card w/Message Waiting

The NT8D09 Analog Message Waiting Line Card provides 16 analog ports for single line telephones and analog devices. Provides talk battery and signaling for up to 16 regular 2 wire common battery analog (500/2500 type) telephones and key telephone equipment. Also provides low current feed to light the message waiting lamp on telephones equipped with the Message Waiting feature. Supports 56K modem operation. Cards later than vintage NT8D09AK provide improved performance on long lines, particularly for lines used outside of a single building environment.