HDM2101消防電話系統是建筑物消防系統中重要的消防設備。多線制消防電話具有工作可靠、施工簡單、通話清晰、覆蓋范圍寬廣、易于維護等特點，是當前眾多消防通信產品中的主流產品。系統主要由消防設備電源、消防電話主機和多個品種的消防電話分機構成，其中消防電話主機內可裝5塊用戶板，每塊用戶板可有8個電話分機端口，每個端口可接消防電話分機4部，共計可接消防電話分機32部。另外用戶板電話分機端口還可選擇多線制消防電話插孔接駁，每個端口最多可接駁6個消防電話插孔，整套系統最多接駁數量不大于1000個，形成較大的消防電話覆蓋范圍，系統中設有末端檢測電阻，用于判斷各分路是否出現短路、斷路故障，除此以外本系統還設計有其它諸多易于使用、便于安裝的人性優異功能。HDM2101 conventional fire telephone system as one key part of emergency communication, is highly reliable, provides high quality of voice and is easy for maintanence. HDM2101 exchange panel may have 8 to 40 loop zones configeration refer to field requirements, every 8 loops are integrated on one loop interface broad, where the exchange panel may have up to 5 loop interface broad. For each loop zone, the system allows to connect 4 telephone extensions or 60 telephone jacks, while 1000 communication spots at total are supported in system.