This object selects which local clock source
used to drive the transmit data for the port.
This option is not available when the port's
timing mode is loop.
oscillator(1) selects the on board oscillator.
busLine8K(2) selects the 8 KHz clocking
bus line. All CSM-interface types except
for OC3 and OC12 can use an 8 KHz clock
from the bus to generate their local timing.
busLine19M(3) selects the 19.44 MHz
clocking bus line. All CSM OC3, OC12 and
CSM-AB-CE-T1 and CSM-AB-CE-E1 interface types can
use a 19.44 Mhz clock from the bus
to generate their local timing. In
the case of the CSM-AB-CE the adapter
board does a divide operation on the
19.44 Mhz clock to get an 8 Khz clock
to use.
Currently, only the CSM-AB-CE T1 and E1
adapter boards have the ability to support
either busLine8K and busLine19M options.