They are all in one units which are designed for installation simplicity, robust use in transport environments and provide robust tamper-detection. Functionally, they are identical with the exception of the network modems and you can easily mix your selection fo VDLs based on differing network constraints in your areas of operation. They include a high-performance GPS engine, input/output and expansion options. This is offered at an unbeatable price point, including standard combo antennae options. Download the VDL GPRS and VDL CDMA product brochure (810 kb PDF) >> Software | VDL Inside | VDL GPRS & VDL CDMA | VDL ZDC | CAN+ Modules | Configurations
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