Modem Connections; Master Simulation Mode - Modem Connection - Applied Systems Engineering ASE2000 User Manual

13.3. Modem Connections

The following figures illustrate different cabling configurations for connecting the ASE2000 Test
Set equipment to the phone line circuits through a modem. The ASE Dual-Channel modem
is used in the illustrations but the same principles apply to any modem. The ASE modem is a
dual-channel modem with two DB-25 female connectors and a power connector on one side of
the modem box, and two RJ-11 receptacles on the opposite side of the box. When using the
modem for Monitor Mode, ASE recommends setting the monitor mode switch to the ON position
to correctly balance the line. If you are not running in Monitor Mode, set this switch to OFF.
Note: When set to on, the switch forces the modem to run in high-impedance mode by
removing the 600  load from the receive line.
13.3.1. Master Simulation Mode – Modem Connection
ASE2000 V2 Communication Test Set User Manual
ASE2000 Test Set
Power Cable
Master
Transmit
Pair
RTU
Transmit
Pair
Master Simulation Mode
USB Cable
BCOM-USB
Modem
RS-232 Cable
(Only one channel required)
Test Set Modem
Master
Receive
Pair
RTU
Receive
Pair
RTU
Modem Connection
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