Hi,I have an international circuit. I am trying to analyze this fault whereby my WAN equipment(Nortel passport) shows DCD down. It was a downtime of 4minutes, without any reset of equipment serial interface and the carrier CSU/DSU. I further confirm ...

I have an international circuit that has been operationalized recently. In a recent incident, both the CTS & RTS are down(indicated by the LED lightings) on the service provider's modem. The circuit was UP upon just a reset of the modem. I have no id...