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Prerequisites

  • Configure your network mirror ports.
  • Plan where you want to tap your network. For a good recording, both signaling and RTP traffic related to the recorded phones/trunks must be seen on the monitoring port.See
  • Configure your network mirror ports.

Refer to the following links for more information:

Activate the Passive Recorder Service

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Basic settings

  • Recording interface:  NIC NIC on which the recorder is listening to network traffic.
  • Audio format:   storage Storage format for audio-only calls.
  • Bidirectional/Stereo recording: if If the storage format allows then caller is , the caller's audio will be recorded on left called on the left channel, while the recipient's audio will be recorded on the right channel in a stereo media file.
  • Automatic Gain Control: enables Enables AGC on voice streams.
  • Conference Resources IP addresses: IP addresses of conference resources, used for recognizing conference calls.
  • Experimental H.323 support: enables Enables recording of H.323 calls. Module is still under development.
  • SIP support enabled: enables Enables recording of SIP calls.
  • Call timeout: stuck calls after RTP timeout are cleared after this intervalCalls that stop receiving RTP packets will be terminated after this duration following the receipt of the last RTP packet.

Advanced settings

  • Capture buffer size:  packet packet capture buffer size in megabytes.
  • Database cache folder:  database database cache file folder.
  • RTP address translation enabled: recording calls at SBC/RTP proxy usually needs to translate local/private addresses reported by phones behind NAT to the addresses seen in the IP header rewritten by NAT (public address). You can enable a special mechanism that tries to fix RTP address issues here.
  • PCM mixer buffer length: length of mixing buffer in milisecondsmilliseconds. Greater value provides better quality but higher memory load and bursty CPU usage.
  • RTP stream reorder buffer length: length of RTP reorder buffer can be controled controlled here. Greater value provides better reordering but increases memory usage.
  • Record video call as audio call: if enabled, only the audio part parts of video calls are recorded; otherwise, else video calls are recorded in Verba Media Format.
  • Media format fallback: in case of not supported unsupported codecs, too many streams, not supported streams, transcoding quality issue, the recorder can intelligently change storage format to different kind of codecs, which might preserve the recording in more optimal quality.
  • Filter duplicated recordings by caller-called: only one call with the same participants will be recorded. This can avoid call duplication in the case of SBC/RTP proxy recording related to inbound and outbound legs.
  • Skip calls without media: Do not insert CDR at CDR at calls where no RTP has been received/processed.
  • SIP URI modification: control how to transform SIP URI.
  • Record incomplete calls: if enabled CDR related to not established calls due to call cancellation, If enabled, CDRs for calls that were not established—such as those resulting from call cancellations or busy/not available response will responses—will be recorded with the appropriate end cause infoinformation.