Chapter9. SIP Traffic

Domain or IP address

Enterthe domain name or IP address of the external SIP proxy.

Port

Enterthe port number of the external SIP proxy.
Ifno port number is entered, the Telecommuting Module will make a DNS query for an SRV record. If a port
numberis entered, it will query for an A record.
Delete Row
Ifyou select this box, the row is deleted when you click on Add new rows,Save, or Look up all IP addresses
again.
Create
Enterthe number of new rows you want to add to the table, and then click on Create.
Class 3xx message processing
Sometimesduring negotiation for a connection, status messages about this process will be sent. Here you select
whetherto forward these to the client or process them in the Telecommuting Module.
Aclass 3xx message from a server means that the connection attempt was terminated, but no connection was
established,e.g. due to use of the wrong address or service. TheTelecommuting Module as well as some clients can
usethis information to make new attempts which might have a better chance to succeed.

Forward class 3xx messages

Thechoices are Forward all, which forwards all class 3xx messages to the client (which might be able to use this
information),and Follow redirects, which means that the Telecommuting Module itself uses the information and
mightmake new connection attempts. In this case, it will only inform the client when the connection finally is
establishedor the attempt has failed totally.
DNS Override For SIP Requests
Here,you can register SIP domains to which the Telecommuting Module should be able to forward requests, but
whichfor some reason cannot be resolved in DNS. Enter an IP address and port to which the requests should be
forwarded.You can also select to use a specific protocol.
Ifyou use a dialing domain that looks like an IP address, you must enter that dialing domain here along with the
SIPserver for that domain.
Youcan enter more than one IP address or host name for a domain, and set weights and priorities for these.
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