Where can I buy a MTNL  Internet Telephony Card?
How many calls can I make using a MTNL Internet Telephony Card?
If I want to use my account from more than one computer, do I have to buy separate Prepaid Cards?
Can I share my Prepaid Card with my friends?
Can I get a refund if I lose or damage my Prepaid Card?
How do I review the calls I've made and the balance on my Prepaid card?
Where can I call?
What do I need to be able to make calls from my PC?
Which Internet browser can I use?
How do I make a phone call?
How can I improve the sound quality of the call?
I hear an echo during the call. What should I do?
How do I change the sound volume?
Why do I get a distorted or choppy sound sometimes?
Why can't the receiver hear me immediately after picking up my call?
I get a busy tone after my call is connected, what is the cause?

Where can I buy a MTNL Internet Telephony Card?
The cards are available at all the Sanchar Haats,customer Service Centres and more than 200 marketing agents of MTNL..
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How many calls can I make using a MTNL Internet Telephony Card?
You can make as many calls as you like until your calling credits run out.
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No. Prepaid calls can be made from any computer (for example, home and office). However, we suggest you exercise caution if you make Prepaid calls from a shared computer. Clear the account number/User ID and PIN fields after ending your calling session. The use of public computer terminals to make Prepaid calls is discouraged.
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Can I share my Prepaid Card with my friends?
The prepaid calling cards are user independent. Hence you can share it with your friend. Just remember to check your card balance before trying to make a Prepaid call.
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Can I get a refund if I lose or damage my Prepaid Card?
No. Once you have bought a Prepaid card you are responsible for the safety of your card and confidentiality of your account number/User ID and PIN.
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How do I review the calls I've made and the balance on my Prepaid card?
Your Prepaid card balance is displayed in the Call History. To view your Call History, type in your account number/User ID and PIN on the validation page.
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Where can I call?
You can use your PC  to call any landline / cellular phone anywhere in the world outside of India. 
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What do I need to be able to make calls from my PC?
Your PC should have the following configuration:

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Which Internet browser can I use?
TheMTNL Internet Telephony works best with Microsoft Internet Explorer 5.0 & above or Netscape Navigator 4.5 to 4.7 & 6.1. Also, make sure you set your Preferences to accept cookies.
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After you log in with your MTNL User ID and password, the MTNL applet will pop up. Dial the phone number you want to call by clicking the numbers on the keypad. You can also click on the phone number display box to set the cursor and use your keyboard to type the phone number.
Click the "Send" button or press "Enter" on your keyboard to dial the number.
Adjust the speaker and microphone volume with the slider buttons on the MTNL net2phone.com keypad.
Hang up by clicking the keypad's "End" button.
To Redial, click on the "Send" button to recall the last phone number dialed. The number will be inserted in the phone number display box. Click on "Send" again to place the call.
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One of the factors that can affect sound quality is the Internet bandwidth available during your call. Try to avoid making calls during peak Internet usage hours when traffic is high. Another tip is to use a headset with a built-in microphone. This will help eliminate echo and ensure better sound. Adjust the microphone volume so that your speech is not too loud.
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We recommend using a headset as this reduces the echo effect. If you are using speakers, the feedback from them may cause the person on the phone to experience some echo. Our software will detect this echo and will automatically try to compensate for this, but it may not be able to eliminate all traces of the echo. Try to move the microphone as far away from the speakers as possible.You can also try lowering the speaker volume. This will usually reduce the echo.
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You can control the speaker and microphone volume by manipulating the volume control knobs on the dialer. Alternatively, open the Windows Volume Control by selecting the Start menu, followed by Programs, Accessories, Multimedia, and Volume Control.
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The distorted or choppy sound is due to data packets of the speech being lost or dropped. This could be due to a bad Internet connection, low bandwidth, sound card problems, insufficient memory, or a slow CPU. Always ensure that the latest sound card driver is installed. It is advisable to close unnecessary programs to conserve memory and CPU load, when you use the Prepaid Calls Service. Try to make calls during non-peak hours to ensure better bandwidth.
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Due to the network, the receiver will experience a five second delay before hearing your voice. You may wish to inform the receiver of this limitation.
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It means that the phone number that you've dialed is engaged or busy. The phone gateway that the PC-to-Phone Service communicates with is unable to terminate the call automatically. Click hang up to terminate the call manually and try again later.
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