XR·2120AADVANCE INFORMATION
212A/V.22 Modem Filter
GENERAL DESCRIPTION
The XR-2120A is a filter system for performing the complete filter function for Bell 212A or CCITI V.22 type modems. The XR-2120A supplies both transmit and receive filtering functions for the standard 1200 Hz and 2400 Hz 212A1V.22 carrier frequencies. Also supplied are mode switching, ...
