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T1/E1 ports on the SBC 2000 are provided via removable T1/E1 PSTN Interface cards. The SBC 2000 supports up to two T1/E1 PSTN Interface cards with a maximum of 16 physical T1/E1 ports. The T1/E1 PSTN Interface cards are available with 8 T1/E1 ports licensed individually. Each SBC 2000 T1/E1 PSTN Interface Card provides two four-port spans, each span is individually configurable as either T1 or E1.
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