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, , . , , -. , . ASVD (Analog Simultaneous Voice/Data) DSVD (Digital Simultaneous Voice/Data) , . , () .

, , ISDN, , . .

Internet, .

Microcom http://www.mot.com/MIMS/ISG  
Motorola sales@multitech.com  
Multi-Tech http://www.usr.com  


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