用于 HDM3310總線消防電話總機間的網絡連接，具有 A/B端，可各連接 1臺消防電話總機的通訊總線，實現數
字通信和語音信號的路由傳輸。 ★ 由通訊總線為網絡路由器進行供電，無需外接電源，工作電壓范圍為DC24V±4V。 ★ A/B端在各自接入的通訊總線系統中各占 1位編碼地址，有工作燈指示巡檢狀態。 ★ A/B端采用隔離電路設計，可減小通訊總線噪聲串擾。 ★ A端適于連接中心控制消防電話總機，而 B端連接其他分區的消防電話總機。 ★ 金屬外殼，不易損毀，抗干擾能力強。
★ Used for networking two or more HDM3310 addressable telehphone exchange, designed side A and B,
which connect bus-line of two exchanges respectively and realize bridging and networking voice and
digital signal. ★ Power supplied by exchange bus-line, no additional power source needed, rated voltage range: DC18-
DC26V ★ Isolated design between Side A and Side B, to minimizing crosstalk noise. ★ Side A is designed to connect to central control exchange, side B connects to other exchange. ★ Metal shell, not easy to broke, has strong shock resistance and anti-jam capability.
