Techroutes access product PCM Multiplexer provides conversion between ITU‐T G.703 standard E1 and voice; realize the long‐distance extend of telephone line through E1 channel. Techroutes access product PCM Multiplexer is a high‐performance, multi‐type long‐range Ethernet Bridge. Its small size, low cost and very appropriate to the cost‐sensitive bridging applications.FXS and FXO to extend over E1 transmission also can with Ethernet and RS232 or RS485 serial interface together.