Best Expansion Modules with ISDN Q.Sig Supported ISDN
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Check Site at AmazonPositives: Error Correction Protocol: ITU V.42 (LAPM), ISDN Terminal Interface: BRI, Supported ISDN: FRANC,CT1 (Belgium),BELG,ISDN Q.Sig,EURO-ISDN (DSS1/ETSI),ISDN 5ESS,ISDN - 1(NI-1),ISDN 1TR6,INS Net 64 (Japan),JAPAN,VN3 (France), Transmission Line: ISDN
