I want to thank you all for taking the time to respond to me. I believe all your answers are correct and I'm going to take advise from it. I'm also going to call Benefits and ask them few questions in regard my case even though I believe for sure I'm not eligible for a partial prepayments for my loan.
here is the explanation which defines the options for loan payments
I copy and paste it form the website
What is the payoff amount and process for paying off my loan? Based on your plan's provisions you may be able to payoff your loan in full before your original loan term. If your plan allows you to payoff your loan in full before the original loan term you will see a "Pay Off Loan" link on the Loans page in NetBenefits . Click Pay Off Loan to view your payoff amount and to find information about how to pay off your loan online.
Your payoff amount may include principal and interest. Payoff amounts may require additional payroll deductions.
Additionally, some plans offer the ability to make partial payments. Partial payments will be applied to the outstanding loan balance including interest. Partial payments may NOT be used to prepay loan payments - i.e., you may not send one lump amount to cover the next five payments. Loan payments will continue to be due based on the loan agreement. If your plan allows, you can click the "Make an Additional Payment" link on the Loans page in NetBenefits to get information on how to submit a partial payment.
Here is the agreement that I signed for the loan request:
YOUR AGREEMENT
• Agree to take full responsibility for ensuring that all loan payments are made on time, repaying both the loan amount and the finance charge itemized above.
• Agree to repay this loan via payroll deduction if you had a defaulted, unpaid loan balance when this loan request was initiated.
• Understand that if you request a full payout, the unpaid loan balance will be included in the calculation of your tax liability. Note: The outstanding loan balance may be declared a distribution to you, which is a taxable event.
• Understand that if your employment with your current employer ends, either of the following could occur:
• Understand that, if this loan goes into default (whether because you failed to make payments or your employment ended), any of the following could occur:
Any exchanges or withdrawals made within your retirement plan after your Loan request and before the Amount Financed is paid to you may cause the Loan transaction to be rejected.