Telenetics MIU Dial or Leased Line modem with RS-485 manual SB-1 Closed on RS485 Received RX & /RX

3.5 MIU/485 B switch (external)
SB-1	Closed (ON) RS485 Received RX & /RX		DC terminated with SB-2 Closed
SB-1	Open (OFF) RS485 Received RX & /RX		AC terminated with SB-2 Closed
SB- 2	Closed (ON) RS485 Received RX & /RX terminated
SB- 2	Open (OFF) RS485 Received RX & /RX high impedance (Z)
SB-3 & 4 Closed (ON)		2- wire configuration or loopback mode
SB-3 & 4 Open (OFF)		4- wire configuration

Install Op and Diags for MIU Modems and RS485 (0049-0002-010A) Page 3 of 16