The Huawei EA5800-X2 is a compact OLT model in the SmartAX series, used in PON deployments like Campus OptiX. HCSA-Sales-Transmission & Access documentation specifies that it supports 2 service-card slots, balancing capacity and size for small-to-medium scenarios. Thus, B is the correct answer.
[Reference: Huawei EA5800-X2 Specifications, HCSA-Sales-Transmission & Access training materials., , ]
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