Administrator's Guide

Chapter 11. SIP Traffic
No.
The order of the function. You change order of the functions by giving them new order
numbers.
Routing Function
These are the functions to be ordered. DNS Override means the DNS Override For SIP
Requests table. Local Registrar means all locally registered users (but not registration re-
quests) and the Static Registrations table. Dial Plan means the Dial Plan table.
Class 3xx Message Processing
Sometimes during negotiation for a connection, status messages about this process will be
sent. Here you select whether to forward these to the client or process them in the Telecom-
muting Module.
A class 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. The Telecom-
muting Module as well as some clients can use this information to make new attempts which
might have a better chance to succeed.
The choices 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 Telecom-
muting Module itself uses the information and might make new connection attempts. In this
case, it will only inform the client when the connection finally is established or the attempt
has failed totally.
Normally, the CSeq number of the request is kept when SIP devices follows redirects. In
some situations, other SIP equipment might require the CSeq number to increase when the
Telecommuting Module follows redirects. Select here if it should do so.
206