Programmable Voice

  1. Home
  2. Docs
  3. Programmable Voice
  4. HMP Elements
  5. Running in PCAP mode

Running in PCAP mode

Voice Elements Platform SIP Stack (HMP Elements) in default mode can be constrained by Winsock. On modern servers we have found that for all intents and purposes HMP Elements gets limited to about 500 concurrent ports when using Winsock.

In order to accommodate higher density VoIP deployments, Voice Elements Platform can run in a special PCAP mode that allows it to achieve higher port densities of up to 750 and potentially 1000 concurrent ports.

When to Use WinPcapMode

If you are running 500 ports or less, you will want to continue using Winsock mode. By default HMP Elements uses Winsock. If you would like to run more than 500 ports on the same system, you should use WinPcap mode.

How to Use WinPcap Mode

  1. Make sure you have the latest version of HMP Elements installed
  2. Download and install WinPcap 4.1.2 [1]
  3. Modify your HmpElementsServer.exe.config configuration file to use one of the winpcap modes below.
  4. Restart HMP Elements

Modify your Configuration File for WinPcap

HMP Elements has 4 different settings for it’s packet capture mode.

They are:

<setting name="PacketCaptureMode" serializeAs="String">
<value>Legacy</value>
</setting>

<setting name="PacketCaptureMode" serializeAs="String">
<value>WinSock</value>
</setting>

<setting name="PacketCaptureMode" serializeAs="String">
<value>WinPcap</value>
</setting>

<setting name="PacketCaptureMode" serializeAs="String">
<value>WinPcapReceiveOnly</value>
</setting>

Legacy and Winsock Mode

Both Legacy and Winsock Mode will both use Winsock for it’s underlying connections. This mode should be used when you would like to use 500 ports or less.

WinPcap

This mode will use WinPcap for both send and receive. Some network cards may have difficulty keeping up with WinPcap for both send and receive operations, so a separate mode allows WinPcap to be used for Receive only.

WinPcapReceiveOnly

This mode uses WinPcap to receive packets only. This mode is useful for when network cards can’t handle all thet traffic generated by using WinPcap mode for both send and receive operatrions.

Was this article helpful to you? Yes 7 No

How can we help?