关于PTN单板描述正确的是(A.L12 interface board can be inserted into slot 7 in OptiX PTN 190
关于PTN单板描述正确的是(
A.L12 interface board can be inserted into slot 7 in OptiX PTN 1900
B.EFG2 interface board can provide 2 electric GE interface
C.L12 can provide 16 * 120-ohm E1 interfac
D.CD1 processing board can provide 2 Ch STM-1 interface