The B8512G and B9512G have slots for two B430 Plug-in Telephone Communicators to provide redundant telephone connections.
Upon power up the panel uses the B430 in the Mod-1 slot until a Test Report is initiated or when the panel phone supervision declares the line currently in use as failed.
B430, B8512G, B9512G
How to configure Door Control on both sides of a door with B8512G, B9512G or B6512 panels.
How to configure Door Control for Card-In and Card-Out with B8512G, B9512G or B6512 panels.
How to configure Access Control for Card-In / Card-Out with B8512G, B9512G or B6512 panels.
This article demonstrates how to enable the Telnet password and secure the D6686 IPv6 Communicator from Internet based attackers, attempting to utilize the second available tunnel.
How to return the D6686 to factory settings.