Implementing SIPREC-Based Call Recording with Third-Party Recording Platforms

How-To-Articles
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Implementing SIPREC-Based Call Recording with Third-Party Recording Platforms

Executive Summary & Architectural Context

In highly regulated industries-such as investment banking, insurance, or legal services-call recordings are not just “nice to have” training tools; they are legal evidence. Many of these organizations have spent a decade building specialized compliance vaults (e.g., Verint, NICE, Dubber, or Red Box) that handle long-term retention, legal hold, and forensic auditing. When these companies migrate to a modern CCaaS platform like Genesys Cloud, the compliance team is often the biggest blocker. They fear that moving recordings to the cloud will break their audit trail. They try to “Bridge the Gap” by manually exporting files from the cloud to their vault every night, but this is a disaster: the metadata (Agent ID, Queue, Account Number) is often lost, the audio quality is degraded by re-encoding, and files occasionally “disappear” during the batch transfer.

A Principal Architect solves this by implementing SIPREC (Session Recording Protocol). Instead of “Record-then-Export,” SIPREC allows for “Record-as-it-Happens.” Your Genesys Cloud Edge (or local SBC) acts as the Session Recording Client (SRC), which forks the audio stream in real-time and sends a second, dedicated SIP/RTP stream to the third-party vault, which acts as the Session Recording Server (SRS). This ensure that the recording lands in the compliance vault at the exact same millisecond the call ends, complete with a rich XML metadata stream that contains every detail of the interaction.

This masterclass details how to architect a high-fidelity SIPREC pipeline between Genesys Cloud and a third-party recording environment.

Prerequisites, Roles & Licensing

Licensing & Permissions

  • Licensing Tier: Genesys Cloud CX 1, 2, or 3 with BYOC Premise or Cloud.
  • Granular Permissions:
    • Telephony > Trunk > View, Edit
    • Administration > Recording > View, Edit
  • Dependencies:
    • The SRS (Vault): Must support the SIPREC protocol (RFC 7268).
    • Network Path: UDP/TCP port 5060/5061 (Signaling) and UDP (RTP) between the SRC and SRS.

The Implementation Deep-Dive

1. The Architectural Strategy: The “Forked Media” Pattern

SIPREC is essentially a specialized conference call. The SRC (Genesys Edge) “Invites” the SRS (The Vault) to join the conversation silently.

The Data Flow:

  1. The Primary Call: Caller A talks to Agent B.
  2. The Metadata Stream: The SRC sends a SIP INVITE to the SRS. This INVITE includes a multipart body:
    • SDP: Defines where to send the audio (RTP).
    • XML Metadata: Defines who is talking (Agent ID, ANI, DNIS).
  3. The Media Stream: The SRC forks the RTP (audio) and sends a copy of both the Caller and Agent channels to the SRS.

2. Configuring the SIPREC Trunk in Genesys Cloud

You must define the “Recording Target” as a specialized SIP trunk.

Step 1: Create the External Trunk

  • Classification: External.
  • Protocol: TCP or TLS (Recommended for metadata integrity).
  • Remote Host: The IP/FQDN of your recording vault.

Step 2: Enable SIPREC on the Voice Trunk

In the settings for your Primary Voice Trunk (the one that carries your customer calls):

  1. Navigate to External Source Recording.
  2. Select SIPREC.
  3. Point to the “External Trunk” you created in Step 1.

3. Engineering the XML Metadata Stream

The power of SIPREC is the XML body. It follows the RFC 7268 standard.

Example XML Fragment:

<recording xmlns='urn:ietf:params:xml:ns:recording'>
    <session session_id="abc-123">
        <participant participant_id="agent-01">
            <nameID>John Doe</nameID>
            <extension>5555</extension>
        </participant>
        <participant participant_id="customer-01">
            <nameID>+15550199</nameID>
        </participant>
    </session>
</recording>

[!IMPORTANT]
Architectural Reasoning: Do not use UDP for SIPREC signaling if you have high metadata requirements. If a UDP packet is lost, the XML body might be corrupted or truncated, causing the recording to land in the vault without an Agent ID. Always use TCP or TLS to ensure every byte of the metadata reaches the SRS.

“The Trap”: The “Codec Mismatch” Silence

The Scenario: You have configured SIPREC. The signaling looks perfect. The vault says it is “Recording.” You download a file to test it.

The Catastrophe: The file is silent, or it contains “Garbage” noise.

The root cause: The Genesys Edge is forking the media in its native format (e.g., G.711 mu-law), but the recording vault is expecting G.729 or Opus. Unlike a standard call where the two sides “Negotiate” a codec, in SIPREC, the SRC often dictates the codec. If the SRS cannot decode that specific RTP stream, it simply writes a “Zero-Byte” or “Garbage-Filled” file to the vault.

The Principal Architect’s Solution: The “Common Denominator” Codec

  1. Force G.711: Almost every recording platform in the world supports G.711.
  2. In the SIPREC External Trunk settings in Genesys Cloud, move PCMU and PCMA to the top of the codec list.
  3. Disable Transcoding on the vault side if possible, as forking a native stream is much more CPU-efficient for the Edge.

Advanced: Secure SIPREC (TLS & SRTP)

For financial compliance (PCI/SOX), sending raw audio across the network is a violation.

Implementation Pattern:

  1. Signaling: Use TLS 1.2+ for the SIP trunk.
  2. Media: Enable SRTP (Secure RTP) on the recording trunk.
  3. Certificate Management: You must upload the Vault’s Root CA Certificate to the Genesys Cloud “Certificate Store” so the Edge can verify the identity of the recording platform before sending audio.

Validation, Edge Cases & Troubleshooting

Edge Case 1: Mid-Call Transfers

The failure condition: A call starts with Agent A, who then transfers it to Agent B. The recording in the vault only shows Agent A’s portion.
The root cause: The SRC failed to send a re-INVITE to the SRS when the participants changed.
The solution: Ensure “Partial Update” or “Metadata Re-Sync” is enabled in the Genesys Trunk settings. This ensures the XML stream is updated every time a participant joins or leaves the call.

Edge Case 2: SRS Capacity Bottlenecks

The failure condition: During peak hours, recordings start dropping or appearing with “Gaps” in the audio.
The root cause: The recording vault’s disk I/O or network bandwidth is saturated.
The solution: Implement SIPREC Load Balancing. Instead of one SRS, use an SBC (like AudioCodes) to act as a proxy. The SBC can receive the single SIPREC stream from Genesys and load-balance it across a cluster of recording servers.

Reporting & ROI Analysis

The value of SIPREC is measured by Compliance Integrity.

Metrics to Monitor:

  • Recording Success Rate: Percentage of ACD calls that have a corresponding file in the vault.
  • Metadata Match Rate: Percentage of files that have a valid Agent ID and Conversation ID.
  • SRS Latency: Time from “Call End” to “File Available for Search.”

Target ROI: By using SIPREC, you eliminate the manual “Export/Import” labor, reduce data loss to near-zero, and provide the compliance team with a high-fidelity audit trail that satisfies even the most rigorous regulatory requirements.

Official References