A Thru Port Pair is used to identify a through path from one PNA port to another. Thru port pairs are always seperated by a colon with a port number on either side of the colon. for example:

1:2    (specifies a thru path from PNA port 1 to PNA port 2)

3:4    (specifies a thru path from PNA port 3 to PNA port 4)

For Example:

ThruPortPairs = 1:2,3:4


Thru Port Pairs are used in the following configurations: