Time frame for a H-1B applicant to enter in to the USA

[Jhansi]

I am currently in India and I have got my H-1B visa approved through an employer in the U.S. Do I have to join them within a certain timeframe.

For example: If I got my H1 approved in Oct 2014 and got my visa staming done in feb 2015. Then what is the time frame for me to enter U.S. So that i will not have any to face any difficulty at port of entry. Please advice

[jairichi]

You can join anytime as long as H1B petition is valid.