Arrays, Index, Match on multiple rows

Hello,

I am having difficulty in getting arrays to work and am paring down my problem to the basics.

What I am trying to do is find information in one cell and return the information in the cell below it.
I have the basic formula that works for one row, this is in the cell B4 and copied down the row:
offset(index($b$13:$m$13,0,match(b3,$b$13:$m$13,0)),1,0)

It works as intended, including the errors. My problem is that while I'll know the row the information could reside, I won't know which row the information is in.
I tried an array that looked like such:
{=offset(index($b$13:$m$13&$b$18:$m$18,0,match(b3,$b$13:$m$13&$b$18:$m$18,0)),1,0)}
comes back with #N/A, and when stepping through the information gathered looks off.

what am I doing wrong?

The enclosed workbook is approximate to the setup we have. Top is set as a backplane in a terminal room, bottom is set how our switches have their ports.
I am trying to find the outlet that matches on the backplane & switch. If a match is found, put the device information under the match to the cell beneath the outlet on the backplane.

Thanks for any suggestions or help you can provide.
Ken

hi Nelsonk,
If I understand this correctly, you are wanting row 3 and row 8 to look at rows 13 and 18, and if there is a match, put the value below it in the device lines rows 4 and 9 in the backplane.
I took your basic formula and extended it to offset and match both lines. In B4, =IFERROR(OFFSET(INDEX($B$13:$M$13,0,MATCH(B3,$B$13:$M$13,0)),1,0),OFFSET(INDEX($B$18:$M$18,0,MATCH(B3,$B$18:$M$18,0)),1,0))
The drag it across, and then copy paste into B9, the drag it across. It simply looks in row 13 and if it finds N/A, looks in row 18.
Squeaky

Thank you both for your responses. They work for me.
I'm going to chew through them and work on if they can be expanded as the sheets have more than 1 sheet & multiple items I need to search.

I already know I'm in for a headache, but that's the nature of my job.

Thanks again.