RE clock interface: GPS output, 1/5/10 Mhz frequency

You can configure the external clock interface of the Enhanced Switch Control Board (SCBE) to a GPS timing source. You can then select a GPS external source as the chassis clock source. You can also configure the external clock interface to output either the selected chassis clock source or a recovered line clock source with GPS timing signals of 1 MHz, 5 MHz, or 10 MHz with 1 pulse per second (PPS).