title: NodeJs-SMPP: ETIMEDOUT error
body: <p>I'm using <a href="https://github.com/farhadi/node-smpp" rel="nofollow noreferrer">node-smpp</a>. App doesn't connect smpp server every time for sending sms, just connects one time and after 2-3 minutes app reconnects again. App works fine and sms sent. But sometimes in 2-3 days or 1-2 weeks occur an error 'ETIMEDOUT' and smpp server doesn't return response.</p>
  
  <p>How to fix this.</p>