Avaya 1603SW Guia Do Utilizador

The 1603SW-I IP Deskphones currently support the H.323 signaling protocol and the SIP 
signaling protocol. 

The H.323 standard provides for real time audio, video, and data communications transmission 
over a packet network. An H.323 telephone protocol stack comprises several protocols:

●

H.225 for registration, admission, status (RAS), and call signaling,

●

H.245 for control signaling, 

●

Real Time Transfer Protocol (RTP), and 

●

Real Time Control Protocol (RTCP)

SIP was developed by the IETF. Like H.323, SIP provides for real time audio, video, and data 
communications transmission over a packet network. SIP uses various messages, or methods, 
to provide:

●

Registration (REGISTER),

●

Call signaling (INVITE, BYE)

●

Control signaling (SUBSCRIBE, NOTIFY)

The 1603SW-I SIP Deskphones use built-in Avaya SIP Certificates for trust management. 

The 1603SW-I SIP Deskphones do not support Media Encryption (SRTP). 

The 1603SW-I IP Deskphones are loaded with either H.323 or SIP software as part of initial 
16xxupgrade.txt file administration and initialization during installation. Post-installation, 
software upgrades automatically download using the proper signaling protocol.