title: Asterisk variable maximum length
body: <p>I am new to asterisk , I have  searched for  limitation for the max length of  asterisk's UAC parameters</p>
  
  <p>ex: username,secret,callerid,fromuser</p>
  
  <p>I have googled for the same but didnt find the information on the same, but in asterisk source directory  channels/sip/include/sip.h  , i have seen below lines</p>
  
  <p>char username[256]<br>
   char secret[256]</p>
  
  <p>what is the max length allowed for UAC parameters in asterisk?</p>