Train Berth Codes?

Just booked tickets for AC2 from Jaislamer to Jaipur for my family. As part of the ticket reservation, Berth Codes are given. They are "UB, SL, LB, SU". UB and LB probably mean upper and lower berth, but what does SL and SU mean? Upper and lower what? Thanks

SL and SU mean "Side Lower" and "Side Upper", respectively. These are the berths which are parallel to the aisle.

Thanks for the info.
But now I am getting dazed and confused. I thought that AC2 had 4 sleeping berths, upper and lower across from each other. If the SL & SU are parallel to aisle, how is the cabin layed out?
Many thanks!

Dear ononotu,
SL>>>>LB/UB
--->>>>------
SU>>>>LB/UB
===========
The arrowed portion is gangway
===========
If you desire to have exclusive four-berthed Cabin with Door and without any SL/SU, then you may have to opt for First Class OR First AC.
==========
V.Srinivasa Prasad
29.10.2005/9.55 hrs.

The LBs and UBs are perpendicular to the aisle, with the UBs directly above the LBs. SL and SU are parallel to the aisle, with SU directly above SB. The aisle runs between the SL and LBs.

Hope I could explain it properly!

Although it's already been explained perfectly, below are links to the layout diagrams of all classes on Broad Gauge trains (most) and metre gauge trains.

Seat layout for Broad Gauge trains (1).

Seat layout for Broad Gauge trains (2).

For overnight journeys the seats turn into berths, to see if a particular seat number converts to an upper, middle, lower, side upper or side lower berth, click on the following link.

Berth layout for Broad Gauge trains.

There are still some Metre Gauge trains, particularly in Tamil Nadu and North East India, as well as other areas.

Seat layout for Metre Gauge trains.

Berth layout for Metre Gauge trains.