1.  Added an applicable module BG600L-M3.   
2.  Updated  the  valid  value  range  of  <timeout>  in 
AT+QICLOSE  from  1–65535  to  0–65535  (Chapter 
2.3.5). 
3.  Added <RAI_info> for AT+QISENDEX to  configure 
RAI (Chapter 2.3.9). 
4.  Changed  the  default  value  of  <max_backoffs>  of 
AT+QICFG="tcp/retranscfg"  from  8  to  12  (Chapter 
2.3.15). 
5.  Added  AT+QICFG="sack"  and  AT+QICFG="tcp/ke
epalive"  commands  (Chapter  2.3.15).   
6.  Added some examples about TCP/UDP operations 
under  IPv6  (Chapter  3.3,  3.7  and  3.9)  and  an 
example about UDP client with RAI feature (Chapter 
3.10).