Clock interface modules provide clock distribution between modules when the backplane is in use by voice applications. For the CTP150 model, the serial and T1/E1 interfaces each have a clock port, although only one port needs to be used for both interfaces. One port is of the HD-26 connector type, and the other is of the RJ-45 connector type.
![]() | Note: The external clock reference port must be connected to any module that is in slot 0, the right-most module slot on the chassis. |