Chapter 14 VoIP
103
T38 Fax Relay
Select this if the Router should send fax messages as UDP or TCP/IP packets through
IP networks. This provides better quality, but it may have inter-operability problems.
The peer devices must also use T.38.
Server Address
Enter the IP address or domain name of the SIP outbound proxy server.
Server Port
Enter the SIP outbound proxy server’s listening port, if your VoIP service provider gave
you one. Otherwise, keep the default value.
SIP TOS Priority
Setting
Enter the DSCP (DiffServ Code Point) number for SIP message transmissions. The
Router creates Class of Service (CoS) priority tags with this number to SIP traffic that it
transmits.
RTP TOS Priority
Setting
Enter the DSCP (DiffServ Code Point) number for RTP voice transmissions. The Router
creates Class of Service (CoS) priority tags with this number to RTP traffic that it
transmits.
Expiration
Duration
Enter the number of seconds your SIP account is registered with the SIP register
server before it is deleted. The Router automatically tries to re-register your SIP
account when one-half of this time has passed. (The SIP register server might have a
different expiration.)
Register Re-send
timer
Enter the number of seconds the Router waits before it tries again to register the SIP
account, if the first try failed or if there is no response.
Session Expires
Enter the number of seconds the Router lets a SIP session remain idle (without traffic)
before it automatically disconnects the session.
Min-SE
Enter the minimum number of seconds the Router lets a SIP session remain idle
(without traffic) before it automatically disconnects the session. When two SIP devices
start a SIP session, they must agree on an expiration time for idle sessions. This field is
the shortest expiration time that the Router accepts.
Dialing interval
selection
Enter the number of seconds the Router should wait after you stop dialing numbers
before it makes the phone call. The value depends on how quickly you dial phone
numbers.
Phone Key Config
Use this section to customize the phone keypad combinations you use to access certain features on the
Router.
Caller Display Call
This code is used to display the caller ID for outgoing calls.
Caller Hidden Call
This code is used to hide the caller ID for outgoing calls.
One Shot Caller
Display Call
This code is used to display the caller ID only for the phone call your are going to
make.
One Shot Caller
Hidden Call
This code is used to hide the caller ID only for the phone call your are going to make.
Table 61
SIP > SIP Service Provider: Edit (continued)
LABEL
DESCRIPTION