Provides one Ethernet NM port, one NM serial port, and one NM cascading port.The GE electrical ports are compatible with the FE electrical ports. Provides six GE ports, of which four can only be RJ45 GE electrical ports and the other two can be GE/FE optical ports or GE electrical ports equipped with SFP modules.Only SLF2CSHO boards support T1 ports. When CSHO boards work with MN1 boards, these TDM E1 ports can be configured as Smart E1 ports, which support CES E1s, ML-PPP E1s, and fractional E1s. The mode of a TDM E1/T1 port can be configured through software. Supports E1 ports support 75-ohm/120-ohm adaptive impedance. When CSHO boards work with MN1 boards, these ports can be configured as channelized STM-1 ports, which support CES E1s and ML-PPP E1s. Uses SFP modules to provide two STM-1 optical /electrical ports. The first external time port uses the same physical connector as the external clock port.
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