133 Matrix SETU VFXTH System Manual
• SIP Over TLS: SETU VFXTH supports transporting of SIP messages over TLS. TLS protects SIP 
signaling against loss of integrity, confidentiality and against replay. 
 
By default, SIP over TLS is enabled. If you want to receive SIP messages over TLS, keep this option 
enabled.
You must also enable ‘TLS' on the SIP Trunk. 
• SIP UDP Port: This is the port on which the SETU VFXTH listens for SIP messages transported over 
UDP. This port is also used as the source port for sending SIP messages to the remote peer. The valid 
range for this port is 1031–65534. Default: 5060.
• SIP TCP Port: This is the port on which the SETU VFXTH listens for SIP messages transported over 
TCP. This port is also used as the source port for sending SIP messages to the remote peer. The valid 
range for this port is 1031–65534. Default: 5060.
• SIP TLS Port: This is the port on which the SETU VFXTH listens for SIP messages transported over 
TLS. This port is also used as the source port for sending SIP messages to the remote peer. The valid 
range for this port is 1031–65534. Default: 5061.
• RTP Listening Port: This is the port on which the SETU VFXTH listens for RTP Packets. This port is 
also used as the source port for sending RTP packets to the remote peer. The valid range for this port 
is 1032–65535. Default: 8000.
• SIP INVITE Timer: This is the time in seconds for which SETU VFXTH waits for a response from the 
called party after sending INVITE message. This timer starts after sending INVITE message to the 
called party and stops on receipt of the provisional response or the final response or when the user 
disconnects the call. On expiry of the timer, the SETU VFXTH terminates the call process and gives an 
error tone to the user. The range of the SIP INVITE Timer is 10–200 seconds. Default: 30 seconds.
• SIP Provisional Timer: This is the time in seconds for which SETU VFXTH waits for final response 
after receiving the provisional response from the called party. This timer starts on the receipt of the 
provisional response from the called party and stops on receipt of the final response from the called 
party or when the user disconnects the call. On the expiry of the timer, the SETU VFXTH terminates the 
call process and gives error tone to the user. The range of the SIP Provisional Timer is 10–200 
seconds. Default: 180 seconds.
• General Request Timer: This is the time in seconds for which the SETU VFXTH waits for response for 
a transaction request. This timer starts on initiating a transaction and stops on the receipt of a response 
for the request. On expiry of the timer, the SETU VFXTH clears the transaction. The range of the 
General Request Timer is 10–60 seconds. Default: 20 seconds.
If you have made any changes in the NAT or SIP Parameters, all the current ongoing calls will be 
disconnected when you submit the page to save the changes.