The SRM-31 miniature sync/async modem operates full duplex over a single pair of wires. It supports data rates from 1.2 kbps to 128 kbps. The transmission range is up to 8 km (5 miles) over 24 AWG cable, independent of the data rate. IDSL technology (ISDN, U interface) provides extended range and efficient transmission over a single copper pair.The SRM-31 can operate opposite the ASMi-31 modem, supporting remote control and monitoring. When the ASMi-31 is a card in the LRS-24 rack, the SNMP central management station can perform control and monitoring of the remote SRM-31.Power is provided by a wall-mounted power supply that is supplied with the product.End-to-end signaling is available with no interference to data transmission. The user can select between RTS/DCD and DSR/DTR end-to-end signaling options. 
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