Use the WebAdmin Interface to configure the SIP module. Open the Real-Time pages in the Settings realm, then open the SIP pages.
Click the Transport link to open the SIP Transport Settings.
The Transport panel allows you to configure the network-level options for SIP packet receiving:
Log Level: Use this setting to specify the type of information about SIP packets and SIP transport the module should put in the Server Log. Usually you should use the Failure (unrecoverable problems only), Major (session establishment reports), or Problems (failures, session establishment and non-fatal errors) levels. When you experience problems with the SIP module, you may want to set the Log Level setting to Low-Level or All Info: in this case the packet contents and other details will be recorded in the System Log. When the problem is solved, set the Log Level setting to its regular value, otherwise your System Log files will grow in size very quickly. The SIP module transport records in the System Log are marked with the SIPDATA tag. Generic SIP information records have the SIP tag.
Dump Call-Related Packets: When this setting is enabled, all packets related to VoIP calls (INVITE, BYE, etc) are written to the log as if Log Level were set to All Info.
UDP: To configure the UDP transport, click the UDP listener link. The UDP Listener page will open. By default, the SIP UDP port is 5060.
TCP: To configure the TCP transport, click the TCP istener link. The TCP Listener page will open. There you can specify both secure and clear-text TCP ports. By default, the clear-text SIP TCP port is 5060, and the SIP TLS port is 5061.
Input Channels: Use this option to specify the maximum number of TCP communication channels the module can open. If the number is exceeded, the module will reject new incoming TCP connections.
Idle Timeout: Use this option to specify when the SIP module should close a TCP communication channel if there is no activity on that channel. This helps to reduce the resources used for TCP communication channels on large installations. On the other hand, some SIP clients may not function properly if the server closes its TCP connection on a time-out.
Enqueuers: When this option is set to a non-zero value, received packets are not processed immediately: they are placed into a special queue and the receiving thread becomes ready to receive a new packet immediately. The option specifies a number of additional threads that take packets from that queue and process them, sending them to Server or Client SIP transactions.
Enqueued Limit: When packets are not processed immediately, but placed into a special queue first (see above), this option limits the size of that queue. When the number of packets in the queue exceeds this limit, new received packets are dropped. You may want to increase the number