ZyXEL Communications MSC1000G User Manual page 375

Table 177 Profile > VoIP SIP
LABEL
Port
Registration Server IP /
Domain Name
Port
Proxy Server IP / Domain
Name
Port
URI Type
802.1p Priority
DSCP
Keep Alive
Session Expiration Time
PRACK
Resend
NonceCount Keep
qop Value Quote
Refer-To Bracket
Refer-To Dot
Management Switch Card User's Guide
DESCRIPTION
Enter the SIP server's listening port number, if the VoIP service provider gave you
one. Otherwise, keep the default value.
Enter the IP address or domain name of the SIP registrar server, if the VoIP
service provider gave you one. Otherwise, enter the same address you entered in
the SIP IP / Domain Name field. You can use up to 64 printable ASCII
characters.
Enter the SIP registrar server's listening port number, if the VoIP service provider
gave you one. Otherwise, enter the same port number you entered in the SIP IP
/ Domain Name Port field.
Enter the IP address or domain name of the SIP server or outbound proxy SIP
server (if supplied by your VoIP service provider).
The system uses this address to communicate with the SIP server.
Enter the SIP outbound server's listening port number, if the service provider
gave you one. Otherwise, enter the same port number you entered in the SIP IP
/ Domain Name Port field.
Use this to configure how Universal Resource Indicators (URIs) are sent.
Select SIP where SIP messages are sent to a domain name or IP
address.
Select TEL where SIP messages are sent to addresses represented
as telephone numbers.
Set the IEEE 802.1p priority value for SIP and RTP traffic using this SIP profile.
Set the DiffServ Code Point (DSCP) value for SIP and RTP traffic using this SIP
profile.
Turn SIP session keepalive on or off. When this is on, the SIP UA periodically
sends SIP session refresh requests.
Enter the minimum number of seconds after which the system tears down the
session (if no successful session refresh has occurred).
Sets whether the system sends provisional acknowledgment messages (ON), or
does not send them (OFF).
Set after what percent of the Session Expiration time the IES resends a
registration message. For example, if the session expiration time is 30 minutes
and you set the resend to 50%, the IES resends a registration message after 15
minutes.
A SIP server generates a unique string called a nonce for each authentication
exchange with a SIP client. The SIP client includes the nonce with its subsequent
requests. It also includes the number of requests it has sent with the same nonce
value. The SIP server checks the value against its own count to prevent request
replay attacks where an attacker uses the authentication from a legitimate
authenticated request to authenticate a forged request. Receiving the same
nonce count value twice indicates a replay.
Turn this on to have the IES increment the nonce count by one each time it sends
a request. Turn this off to make the nonce count always one.
Select whether or not the IES adds quotation marks around the qop (quality-of-
protection) value.
For transferring calls, some SIP servers require brackets around the SIP Refer-To
header. Turn these additional brackets on or off.
For transferring calls, some SIP servers require the IP address in the SIP Refer-To
header's Replaces value to be in dotted decimal format. Turn this on to use dotted
decimal format. Turn it off to use %2E instead of dots.
Chapter 11 Profile Screens
375