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Grandstream UCM6204 has 2 FXS ports and 4 FXO ports. Turning into details, this IP-PBX supports features like up to 500 users, 50 SIP trunk accounts, up to 45 concurrent calls, Dual Gigabit network ports with integrated PoE, etc. In short, it's the ideal solution for small and medium-sized businesses. On the other hand, our online store sells UCM6204 at...