@PORTPAIR

• Information about each contact path.
• Is store as newPP % dev_type1, dev_ID1, port1, dev_type2, dev_ID2, port2 in the fortran code.

example

@PORTPAIR
'LASER', 1, 'OptOut1', 'PM', 	1, 'OptIn1'
'PM'   , 1, 'OptOut2', 'FIBER', 1, 'OptIn1'
'FIBER', 1, 'OptOut2', 'MZI', 	1, 'OptIn1'
'MZI',   1, 'OptOut1', 'SPD', 	1, 'OptIn1'
'MZI',   1, 'OptOut2', 'SPD', 	2, 'OptIn1'

Note: While the @PORTPAIR_NUM is 5, @PORTPAIR has 5 entries.
Which means "Type of emitting element, ID of emitting element, output port, Type of receiveing element, ID of receiveing element, input port".