All ports can be configured as either T1, E1 or J1. All physical interfaces supported can be channelized to the DS0 level. Selection of line mode between T1, E1 or J1 is done via software command without physical access to the module. The master clock may be any one of the recovered clocks or one of the two on-board clocks. Module can generate a 1.544 MHz or a 2.048 MHz clock source for use by the framers.
Clock source is software configurable on a port by port basis.