LanScape VOIP Media Proxy™ - User's Reference
LanScape VOIP Media Proxy®
Tile Page
Part Number
Software License Agreement
Getting Started
The LanScape VOIP Media Proxy®
General Description
Media Proxy Configuration
Performing Configuration
Configuration Dialogs
Basic Settings
Network Configuration
SIP Proxy Configuration
Wan IP/NAT Detection
Event 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
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 LanScape VOIP Media Proxy®:


Display startup splash dialog:

When the LanScape VOIP Media Proxy® initializes, it will display an introductory "splash" dialog for a few brief moments. Un-check this option to disable this feature

Start minimized in system tray:

When the LanScape VOIP Media Proxy® starts up, it normally displays its graphical user interface. Check this option to have the media proxy minimize to the system tray area upon startup.

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 real-time mode:

Normally the media proxy operates at a "high" priority mode of execution. If for some reason you want to get additional call handling throughput out of your media proxy, you can enable this option to allow the server to run in real-time mode.


Before using this option, you might consider installing your media proxy software on a faster host machine. Using this option may cause other operating system functions to not be executed in a timely manner. Use this setting only if you understand what you are doing.

Media session timeout (Ms):

This setting only affects calls that have completed their SIP session setup without errors. This value specifies the number of milliseconds that must elapse with no media being received from either call endpoint. If no call media is detected from either call endpoint in this amount of time, the media session will automatically be closed. This setting allows the recovery of media sessions where both call endpoints terminate unexpectedly.

Media session evaluation interval (Ms):

Internally, the LanScape VOIP Media Proxy® evaluates all assigned media sessions at this periodic rate. If a media session is no longer used by the call endpoints, the media session will be tagged as being closed. The media session will eventually be recovered when this interval has elapsed. Any value under 120 seconds is generally appropriate. To allow the media proxy to quickly recover media sessions that are no longer being used, you should set this value to 10 seconds or less (i.e. 10,000 Ms or less).

Orphaned media session timeout:

You should set this value to the maximum amount of time that a call will take to complete its connection (i.e The max amount of time it will take a call to reach final SIP session establishment - the interchange of INVITE and "200 OK" SIP messages).

SIP proxy command timeout:

The LanScape VOIP Media Proxy® needs to communicate with one or more LanScape Centrex Proxy Servers. To do this, the media proxy must send commands to the SIP Centrex proxy. This parameter specifies the acceptable time out value that the media proxy will wait for a response from a SIP proxy. If there are communications errors between a LanScape VOIP Media Proxy® and a LanScape Centrex Proxy Server®, an error or warning will be logged to the logging area of the media proxy's user interface.

Terminate media sessions after receiving SIP BYE messages:

You should leave this setting enabled unless otherwise instructed by LanScape support personnel. When enable, it allows the media proxy to delete media sessions as soon as the LanScape Centrex
Proxy Server® detects a call termination.

Notify SIP proxies when "dead media" is detected

he VOIP Media Proxy has the ability to send events to LanScape Centrex SIP proxy servers regarding dead media sessions. This capability can be turned ON or OFF using this configuration setting.

This capability is primarily useful for deployments that are used with custom or third party billing systems. The media proxy will now communicate a “call termination event” to the specific Centrex SIP proxy that started the call session(s) when dead media is detected for the call. Dead media is detected when one or more media sessions for a call stop interchanging RTP media.

Once notified about “dead media”, the Centrex SIP proxy can then inform user plug-in DLL software about the call termination. This makes possible for user developed plug-in DLL code to communicate with any billing server required for the VOIP deployment.

Detection of "dead media" is a required enhancement that goes above and beyond the capabilities of normal SIP BYE termination call processing for sophisticated VOIP billing deployments.

Relate sibling media sessions:

If your VOIP deployment will support phone calls having multiple media streams per call (i.e. voice and video media streams), then your may want to enable this capability. If this feature is enabled and a call contains multiple media streams, then all sibling media streams will be considered as a block of media streams and all will remain active as long as the call is not terminated and if at least one of the media streams is active (exchanging RTP media). Under this situation, the VOIP Media Proxy will not attempt to reclaim "timed out" media sessions unless all sibling media sessions time out or the call is terminated.

If your VOIP deployment will only support single media session VOIP calls, the you can disable this feature. Doing so slightly reduces processing overhead.

If this feature is disabled, then all media streams are evaluated independent of their relationship to a specific call.

Enable support for encrypted RTP media:

If your VOIP deployment requires that encrypted RTP media data be interchanged between call endpoints, you must enable this setting. Enabling this setting will allow the VOIP media proxy to process encrypted RTP media packets properly. Note that any type of RTP packet encryption is supported. RTP header encryption, RTP media sample encryption or both.

License File:

Allows you to specify the path to your VOIP Media Proxy
® product license file.