Trunk MTU
With a large amount of traffic on IAX2 trunk, there is a risk of bad voice quality when allowing the Linux system to handle
fragmentation of UDP packets.
Depending on the side of each payload, allowing the OS to handle fragmentation may not be very efficient. This setting sets the
maximum transmission unit for AIX2 UDP trunking. The default is 1240 bytes which means if a trunk’s payload is over 1240
bytes for every 20ms it will be broken into multiple 1240 bytes messages. Zero disables this functionality and let’s the OS handle
fragmentation.
Trunk
Frequency
How frequently to send trunk msgs (in ms). This is 20ms by default.
Trunk Time
Stamps
Should we send timestamps for the individual sub_frames within trunk frames? There is a small bandwith use for these (less
than 1kbps/call), but they ensure that frame timestamps get sent end-to-end properly. If both ends of all your trunks go directly to
TDM, _and_your trunkfreq equals the frame length for your codecs, you can probably suppress these. The receiver must also
need to have it enabled.
Min.
RegExpire
Minimum amounts of time that IAX2 peers can request as a registration interval (in seconds).
Max.
RegExpire
Maximum amounts of time that IAX2 peers can request as a registration expiration interval(in seconds).
Advanced SIP Settings
Networking
Table 4-2-1 Definition of Networking Options
Options
Definition
UDP Bind
Port
Choose a port on which to listen for UDP traffic.
Enable TCP
Enable server for incoming TCP connection (default is no).
TCP Bind
Port
Choose a port on which to listen for TCP traffic.
TCP
Authentication
Timeout
The maximum number of seconds a client has to authenticate. If the client does not authenticate before this timeout expires,
the client will be disconnected.(default value is: 30 seconds).
TCP
Authentication
Limit
The maximum number of unauthenticated sessions that will be
allowed to connect at any given time (default is: 50).
Enable
Hostname
Lookup
Enable DNS SRV lookups on outbound calls Note: the gateway only uses the first host in SRV records Disabling DNS SRV
lookups disables the ability to place SIP calls based on domain names to some other SIP users on the Internet specifying a
port in a SIP peer definition or when dialing outbound calls with suppress SRV lookups for that peer or call.
Enable
Internal SIP
Call
Whether enable the internal SIP calls or not when you select the registration option "Endpoint registers with this gateway".
Internal SIP
Call Prefix
Specify a prefix before routing the internal calls.
Advanced: NAT Settings
Table 4-2-2 Definition of NAT Settings Options
