lpE1ClockingSource 1.3.6.1.4.1.562.2.4.1.12.8.10.1.2

This attribute defines the source of the transmit clock for the E1 line. When local is selected, the crystal on the port generates the clocking for the line. When line is selected, the port synchronizes to the clock from the facility. When module is selected, the ports clock synchronizes to the clock provided by the oscillator on the active CP. When otherPort is selected, the port synchronizes to the port with a clocking source of line. When srtsMode is selected, the port sychronization is taken from the SRTS (Synchronous Residual Time Stamp) bits within the ATM cell. If the NetworkSynchronization (NS) component is present the default value of this attribute will be module otherwise it will default to line except for the 3pE1Atm card which defaults to local. The 3pE1Atm card has one common clock source for all ports and does not support the line clock source; all three ports must have the same value, either local or module. The clockingSource values otherPort and srtsMode are only valid for the AAL1 cards. For the AAL1 cards either: all four ports' clockingSource values must be local OR all four ports' clockingSource values must be module OR one port's clockingSource value must be line and the other three must be otherPort. A port can only have srtsMode selected if the other ports are module or srtsMode.