Multi-Tech Systems MultiVOIP GSM SIP-to-Cellular Gateways MVPGSM-2 用户手册

Chapter 6: Using the Software 

Multi-Tech Systems, Inc. 

MVPGSM 

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As noted earlier, the Upgrade Software command transfers from the controller PC to the MultiVOIP GSM unit. 
The settings can be either Factory Default Settings or Current Configuration Settings.