What's a functional equivalent to the SHM-001 or SHM-002 Short Haul Modems used primarily with DMS control systems?

Issue

What's a functional equivalent to the SHM-001 or SHM-002 Short Haul Modems used primarily with DMS control systems?

Product Line

TAC I/A Series

Environment

DMS

Cause

Failure of the SHM-001/002 short haul modems

Resolution

Use the Model 1000SM from Patton Electronics:  http://www.patton.com/products/product_detail.asp?id=98

Original data sheet for the SHM-001 and SHM-002