Avaya 1603SW 사용자 가이드

IETF documents provide standards relevant to IP Telephony and are available for free from the 
IETF Web site: 

Access the ITU Web site for more information about ITU guidelines and documents, available 
for a fee from the ITU Web site: 

Access the ISO/IEC standards Web site for more information about IP Telephony standards, 
guidelines, and published documents:

.