單項(xiàng)選擇題You are provisioning a DS-1 circuit on an ONS 15454 2F-BLSR with a XC-10G card. Each VT1.5 connection must also terminate via the STS matrix. On the originating circuit node, how many STS ports are now available for VT1.5 circuits?()

A.2
B.3
C.4
D.20
E.22
F.24


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