MMTL is optional..You don't need to have it..The optional Modem Management Technology License support capabilities include:
Provides for modem statistics, real-time call-in-progress, monitoring modem activity log, modem hard/soft busy out, and the ability to accomplish modem firmware upgrades. All these features result in reduced downtime, lower support costs, and lower operating costs.
Sends AT commands (while the modem is connected) for additional testing and debugging capabilities
