Asteroid is a voice channel bank, designed in 1U 19" case. It comprises four FXS/FXO modules with 8 ports each. Asteroid can be used for telephone line connection (up to 30 telephone subscribers) to a traditional PBX or IP PBX Asterisk/CallWeaver. The E1 port can be used for connecting the bank to the traditional PBX. Also, Asteroid can be connected to Asterisk/CallWeaver with an Ethernet port and TDMoE protocol. In both connections Loop Start signaling is provided for PBX.