- Modems: ASE’s DM series products are V.23 and Bell-202/202T modems designed for operation over leased line communication circuits as commonly used in the electrical power and pipeline SCADA industries.Rack Mount Bell-202 ModemBell-202 Modem – Box
These modems have been designed with many commonly requested features including 900Hz soft-carrier turnoff, LED indicators, digital control over most timing parameters (in 1 millisecond increments), transmit levels from 0 to -31db, a PTT (Push to Talk) circuit, and input power from 5 to 160 VDC. The primary modem circuitry is based on commercially available ICs with many years of field proven operation.
All Bell modems are available in a 19″ rack configuration with a 16-slot custom backplane, or packaged in a metal box. For IED/RTU manufacturers, a low-cost “board only” version can mount directly in the Remote unit.
Power, Timing, Levels, Isolation, LEDs, Other, Packaging, Testing your modem, Modem Part Numbers