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To answer this question : "And what is the real difference from Roadside and Remote Location".
Assume in Coimbatore Kurla Exp, some berths can be reserved only between Coimbatore and Bangalore. This is called Road side quota (RS quota : start to intermediate).
Some berths (infact the same berths) can be reserved only between Bangalore and Kurla. This is called Remote Location...
more... quota (RL quota : intermediate to end).
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The berths on charts pasted on trains are denoted as "SBC/" and "/SBC" respectively. One cannot book a single berth in these quotas from anywhere in CBE-SBC section to SBC-LTT section. The system does not allow this, neither at booking time, nor at charting time. If some one has to overcome this issue, he needs to book 2 tickets, one upto SBC and other from SBC, to be eligible for these quotas.
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And Sir, I am not angry, I can explain you on phone also.