An auxiliary connection mechanism for allowing a Digital Switching System (DSS) to share an analog line with an analog device (via an auxiliary device port) is disclosed. The auxiliary connection mechanism includes a pair of relays for releasably connecting the auxiliary device port and the DSS to the...http://www.google.ca/patents/US6771773?utm_source=gb-gplus-sharePatent US6771773 - Digital switching system with shared analog line
