Hi Adeel
First will let you know one thing that OTDR always come’s with single port.
Now please tel me your working area like on which network you are working with OTDR.
Please note sensing facility will always comes with filtered type wavelength suppose if you are working on PON network than you have to equipped with filtered wavelength which test you live traffic means you can scene your fiber.
Please sent us more details so that will help you <a href=”http://www.fibershot.net/” target=”_blank”>OTDR</a>