Description S119 and S120 are cost-effective ATA, both are suitable for SOHO application with max 4 account registration, and S119 has 4 versions:
S119-1S: 1 FXS port
S119-IS1P: 1 FXS and 1 PSTN ( lifelive ) port
S119-2S: 2 FXS
S119-1S1O: 1 FXS and 1 FXO
While S120 is 4FXS port
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