VIERLING's product and service spectrum is divided into these commercial areas:

	Mobile Communication			Measurement Solutions
GSM-Gateways  - GSM3-1, ISDN2-1, VoIP  - VTMflex, VTMpro, SCS, SMC GSM-Phones  - coin, card, free, desk Alert and Information Systems  - GR3, GR10, GR-PC CS   - SMbaSic Remote Control  - C6			DSL & Broadband Test Solutions  - Maetrao MTDU / VSA, MAX HD  - VIT-A1, VIT-A2 DSL tester,  - FiberCare, IFC, VOTE-DSL NGN Quality Testing  - TiQoS.Platform, TiQoS.Voice  - TiQoS.VoIP, TiQoS.VoIP Portable  Professional Solutions  - PMP-x, LiMeS, FOG-2M Professional Services  - PiQoS  Weather Measurement  - Weatherman