Chapter 1: Features Overview38 SmartSwitch Router 2000 Getting Started GuideDual Serial and Quad Serial – C/CE Expansion ModulesThe Dual Serial expansion module contains a single dual serial WAN port (two serialports located on one high density connector). The Quad Serial – C and Quad Serial – CEexpansion modules each contain two dual serial WAN ports. In addition, the QuadSerial – C expansion module includes compression, and the Quad Serial – CE expansionmodule includes compression and encryption, for each WAN port. Figure 6 shows thefront panel of the Dual Serial WAN expansion module.Figure 6. Front panel of Dual Serial WAN expansion modulePer-port Tx • Green – indicates when the port’s transceiver transmits packets.• Orange – indicates when the port’s transceiver transmits flow-control packets.Per-port AN • Green – indicates that the expansion module is autonegotiatingthe operating mode of the link between full-duplex and half-duplex.• Orange (intermittent) – indicates that autonegotiation is inprocess.• Orange (solid) – indicates a problem with autonegotiationconfiguration.• Red – indicates an autonegotiation failure. This fault may occur ifthe link partner does not support full duplex.• Off – indicates that autonegotiation has been disabled or the linkis down.Table 12. 1000BASE-LX expansion module LEDs (Continued)LED Description1,2TxRxLinkDual SerialSSR-2-SER1 2
