LanScape Centrex Proxy Server™ - User's Reference
LanScape Centrex Proxy Server®
Tile Page
Part Number
Software License Agreement
Getting Started
The LanScape Centrex Proxy Server®
General Description
Proxy Server Configuration
Performing Configuration
Configuration Dialogs
Basic Settings
Network Configuration
Call Processing Timeouts
Local Directory
Call Routing
Global iNet® Accounts
Media Proxy Support
Event Logging
Wan IP/NAT Detection
Custom Plug In
SIP Logging
Backing up and restoring configuration information
Backing up the proxy configuration
Restoring the proxy configuration
Running Multiple Instances
Running more than one proxy on the same machine
Running the proxy server as a service
Running the proxy server as a service
Proxy Plug-in API
Plug-in API General Description
Deployment Scenarios
Deploying in the global IP address space
Deploying in your private IP address space
Help File Version
Help File Version

Basic Settings

The following dialog is used to specify basic configuration settings for your Centrex Proxy Server®:

For most installations, you should maintain all of the default settings you see above.


Display start up splash dialog:

Enable/disable the display of the startup "splash" dialog.

Start minimized in system tray:

If this item is checked, the Centrex Proxy Server® will immediately minimize to the system tray area when it starts up. If this item is not checked, then the Centrex Proxy Server® will start up normally and display its user interface.

Enable system tray balloon messages:

If this item is checked, the Centrex Proxy Server® will display in the system tray user messages during the normal course of operations.

Enable Record-route mode:

Record routing is a mode of the SIP protocol. This setting enables or disables the Centrex Proxy Servers ability to process SIP related record-route headers. For all applications, make sure this setting is enabled. Under special circumstances, LanScape support may ask you to disable this setting.

Allow bad "Content-Lengh" SIP headers:

If your Centrex Proxy Server software reports that it is experiencing errors due to receiving SIP protocol messages that have improper "Content-Length" SIP headers, you can enable this setting to remove the proxy reported errors. Under normal operation, you should not enable this setting. Doing so will disable the Centrex Proxy's ability to detect partially received or corrupt SIP protocol packets. This setting should only be used temporarily until you or the manufacturer fixes your SIP device or user agent client.

Filter SIP early media provisional responses:

When enabled, this setting will allow the Centrex Proxy Server to filter all 1xx provisional SIP responses that contain "early media" SDP when they are received. You will want to enable this setting if some or all of your SIP devices in your VOIP domain do not properly handle early media SDP in provisional responses. If you are in doubt about this setting, you should leave it unchecked.

Enable "split" media

When enabled, this setting will allow the
Centrex Proxy Server (and any co-deployed LanScape VOIP Media Proxy servers) to handle "split" media deployment scenarios.

The term "split" media refers to the case where call media may not propagate through the same IP addresses that are used for session initiation at the call endpoints.

Split media is particularly useful when interfacing the Centrex Proxy Server to a PSTN gateway service provider that handles SIP session information using a server at IP address #1 but manages call media flow through another RTP media server at IP address #2.

A good example of a real world deployment of split media would be terminating and receiving calls to/from a PSTN gateway provider. The PSTN gateway provider could have deployed a Cisco PGW 2200 SIP call controller at IP address "a.a.a.a" and the Cisco AS5400 media gateway at IP address "b.b.b.b". The handling of SIP and RTP media at different IP addresses can be handled properly when the Centrex SIP Proxy has its "Enable split media" setting enabled. When enabled, the Centrex SIP Proxy and LanScape VOIP Media Proxies will handle split media as appropriate.

If you are in doubt regarding this setting, leave it disabled.

Enable extended errors and warnings:

If enabled, this setting allows the Centrex Proxy Server® to display (in the event log area) additional errors and warnings that normally will not be displayed. We recommend that you keep this setting enabled. If you do not want extra error and warning support, un-check this setting.

Enable Realtime mode:

Allows the Centrex Proxy Server® to execute in Realtime mode. Normally the proxy executes with a high priority mode. This high priority is more than sufficient for call handling. Only use this setting if the proxy seems to fall behind when processing a large number of calls per minute.


Enable this setting at your discretion. It is possible that in realtime mode, the Centrex Proxy Server® can consume all available CPU time and other programs you have running on the host machine will never get a change to execute. Depending on the operating system you are using, this may include some critical operating system tasks. Before you enable this setting, try removing all other unnecessary executing applications on the server machine to see it you can get the performance you require. If you can not achieve the call processing performance without enabling this setting, you might want to think about purchasing a more powerful host server machine.


Display Registrations per minute and ...:
If you enable this setting, the
Centrex Proxy Server® will display performance data in the user interface. If enabled, the following information will be displayed: The number of registrations per minute. The total number of registrations processed since the proxy server was started. The number of call per minute. The total number of calls processed since the proxy server was started. When you enable this setting, you will also have to specify a valid update rate using the "Update rate" edit control.

License File:

This edit field allows you to specify the license file that will be used by the Centrex Proxy Server®. normally this value is initialized when you install the software. The license file that was issued to you by LanScape is only valid for the machine it was requested for. If you have to replace the network adaptor you used to generate your license request or if you need to move your server software to another host machine, you must contact LanScape support so that we can reissue you a new product license. Before requesting a new product license, make sure you have your original purchase invoice number at hand. Sorry, but we cannot reissue product licenses for lost, stolen or deleted  license files. No exceptions.