Operating instructions - SD-RED 20 / SD-RED 60 - Sophos

Connecting devices to the SFP port Both SD-RED models provide an SFP port which can be used to connect the unit to the local router/cable modem or other set-top box via fiber or other standard SFP mini-GBICs (transceivers). This port is a combo port shared with the WAN1 port. Therefore, you can only use one of these ports at any time.

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